JP2017151051A - History monitor sensor and film for packaging - Google Patents

Abstract

The elapsed time can be confirmed from the amount of voltage drop due to discharge with a simple structure, and the use state of the article can be grasped. A voltage detection unit that detects a voltage drop amount due to discharge of a capacitor based on a resistor and detects a signal at the start of discharge of the capacitor, and the voltage detection unit includes a first capacitor 31A and a first resistor 32A. A non-breaking discharge circuit 3A having a second capacitor 31B and a second resistor 32B, the second resistor 32B being provided so as to be broken, and the non-breaking discharge circuit 3B and the non-breaking discharge circuit. 3A provides a history monitor sensor having a configuration in which voltage extraction wirings 33a and 33b are respectively provided. [Selection] Figure 1

Description

  The present invention relates to a history monitor sensor and a packaging film.

  2. Description of the Related Art Conventionally, various products use technology for displaying product information such as date of manufacture, manufacturer / seller name, expiration date, etc. using an IC tag. As a technique for using such an IC tag, for example, as shown in Patent Document 1, it is possible to display the fact that the container mouth has been opened, and even after the container has been opened, A packaging container that can read input information with a reader is known.

  Patent Document 1 describes a packaging container that can recognize the fact of opening by an IC tag built in a cap of a beverage container and a detection circuit that is broken when the cap is opened.

  There is also a sheet-like sensor having a structure that is judged when a film-like sensor is strongly adhered across a container lid and a container body, and the container lid is opened and the container is opened.

JP 2014-5032 A

However, the conventional sensor for confirming the opening of the container has the following problems.
In other words, all of the sensors disclosed in Patent Document 1 can obtain only information on whether the sheet has been opened or not opened by cutting the circuit by breaking the sheet.
For example, when the contents in a container are foods, medicines, or cosmetics that are related to health, it is important to avoid problems such as unauthorized opening or contamination, but from the consumer's perspective, normal use Even so, it is often important when the package is opened.
For food and medicine, there is a fixed deadline after opening, and there is a risk of using the product after the deadline has passed, and there is a problem that it is discarded without being able to confirm when it was opened. There was room.

  The present invention has been made in view of the above-described problems. A history monitor sensor and a packaging film capable of confirming an elapsed time from a voltage drop amount due to a discharge with a simple structure and grasping a use state of an article. The purpose is to provide.

  In order to achieve the above object, a history monitor sensor according to the present invention is a history monitor sensor including a discharge circuit having a capacitor and a resistor, and detects a voltage drop amount due to discharge of the capacitor based on the resistor, A voltage detection unit for detecting a signal at the start of discharge detection of the capacitor is provided.

  Further, the packaging film according to the present invention is a packaging film provided with the above-described history monitor sensor, and the history monitor sensor is integrally provided on the surface of the flexible film base material. It is said.

  In the present invention, the voltage drop due to the discharge of the capacitor (voltage difference) can be detected by the voltage detection unit and the signal at the start of discharge detection can be detected by the voltage detection unit. By grasping the voltage drop amount, the elapsed time from the start of discharge detection to a predetermined measurement time can be confirmed based on the detected voltage drop amount from the start of discharge detection. Then, by mounting the history monitor sensor having such a configuration on, for example, the opening portion of the container, it is possible to check the opening state of the container and the elapsed time from the time of manufacture or opening.

  In the history monitor sensor according to the present invention, the voltage detection unit includes a non-breaking discharge circuit having at least the first capacitor among the first capacitor and the first resistor, a second capacitor, and a second resistor. It is preferable that the second resistance is provided with a breakable discharge circuit provided so as to be able to break, and the breakable discharge circuit and the non-breakable discharge circuit are each provided with a voltage extraction wiring.

In this case, a history monitor sensor in a charged state in which charges are accumulated in the capacitors of both discharge circuits at the time of manufacture can be attached to the opening portion of the container. And after manufacture, the 1st capacitor and the 2nd capacitor will be in the state discharged by the 1st resistance and the 2nd resistance, respectively. Therefore, for example, by breaking the second resistance of the break discharge circuit in accordance with the use situation such as opening the opening of the container, the discharge of the second capacitor is stopped, and the discharge with the first capacitor is continuing. By comparing the voltages, the elapsed time from the time of breaking can be confirmed.
That is, since the non-breaking discharge circuit and the breaking discharge circuit are discharged with the same discharge curve from the time of manufacture to the time of opening, the voltage of the first capacitor and the voltage of the second capacitor are decreased with time. When the second resistance breaks, the voltage drop of the break discharge circuit stops at the time of opening, and the voltage of the non-break discharge circuit continues to discharge. Therefore, since the voltage of the break discharge circuit does not change as the output at the opening time even after the opening time, measure the voltage at an appropriate measurement time after the opening time, and measure from the opening time by the voltage difference The elapsed time up to the time can be calculated. Further, the time at the time of opening (the elapsed time from the time of manufacture to the time of opening) can also be confirmed from the voltage of the second capacitor. If the voltage values of the two capacitors are different from each other, it can be confirmed that they have been opened.

  In the history monitor sensor according to the present invention, the voltage detection unit includes a third capacitor and a charging circuit having a charge supply unit for charging the third capacitor, a fourth capacitor, and a third resistor. A charge / discharge circuit provided on the fourth capacitor so as to be rechargeable by the charge supply unit, and having a detection unit for switching on / off of the charge supply unit, the charge circuit and the charge / discharge circuit, Each is preferably provided with a voltage extraction wiring.

  In this case, the third capacitor and the fourth capacitor are charged when the charge supply unit is on, and the signal at the time of charging at this time can be detected by the voltage detection unit. Therefore, for example, when the charge supply unit is a solar cell, when the solar cell detects light, the third capacitor and the fourth capacitor can be charged by charging, and the fourth capacitor can be charged. The elapsed time from the time of charging can be confirmed by comparing the voltage of the battery and the voltage after discharging.

  In the history monitor sensor according to the present invention, the voltage detection unit may be provided with an RFID tag.

  In this case, since the voltage detected by the voltage detector can be stored in the RFID tag, the information stored in the RFID tag can be read by a reader.

  According to the history monitor sensor and the packaging film of the present invention, the elapsed time can be confirmed from the amount of voltage drop due to discharge with a simple structure, and the use state of the article can be grasped.

It is a top view which shows the structure of the film for packages by the 1st Embodiment of this invention. It is AA sectional view taken on the line shown in FIG. 1, Comprising: It is sectional drawing of the film for packages. It is a figure which shows the state which stuck the film for packages shown in FIG. 1 to the opening part of a paper pack container, Comprising: (a) is the front view, (b) is the side view. It is a figure which shows the structure of the circuit diagram of the log | history monitor sensor in the film for packages. FIG. 5 is a graph showing a change in voltage due to discharge in the circuit shown in FIG. 4 when the first resistance 32A is equal to the second resistance 32B. FIG. 5 is a graph showing a change in voltage due to discharge in the circuit shown in FIG. 4 when the first resistor 32A is not provided (first resistor 32A = ∞). It is a top view which shows the structure of the film for packages by 2nd Embodiment. It is a figure which shows the structure of the circuit diagram of the log | history monitor sensor by 3rd Embodiment. It is a top view which shows the structure of the log | history monitor sensor shown in FIG. It is a schematic diagram for demonstrating operation | movement of the log | history monitor sensor by 3rd Embodiment.

  Hereinafter, a history monitor sensor and a packaging film according to an embodiment of the present invention will be described with reference to the drawings.

(First embodiment)
As shown in FIGS. 1 and 2, the packaging film 1 provided with the history monitor sensor according to the present embodiment is a food that is stuck to an opening or opening of a container such as a food, cosmetic, or medicine. It is used as a package for cosmetics and cosmetics / pharmaceuticals.
In the first embodiment, as shown in FIGS. 3A and 3B, an example applied to a paper pack container 10 for beverages such as a milk pack will be described. The paper pack container 10 is a box-shaped container made of a carton that can be placed vertically, and is provided with an opening portion 11 having a pair of mouth portions bonded to each other at the upper portion, and the pair of mouth portions are separated at the opening portion 11. It has a well-known configuration capable of forming a discharge port. The film for packaging 1 is stuck so as to straddle both mouths of the opening part 11. The detail regarding the sticking position of the film 1 for packages is mentioned later.

As shown in FIGS. 1 and 2, the packaging film 1 includes a flexible film base 2 formed in a sheet shape, and a history monitor sensor 3 provided on the surface of the film base 2.
The film substrate 2 has a ground conductive layer 21 and a dielectric layer 22 laminated on the surface of the ground conductive layer 21.

Examples of the film substrate 2 include polyolefin resins such as polystyrene resins, polyethylene resins, and polypropylene resins, and synthetic resins such as vinyl chloride resins, polyvinylidene fluoride, polylactic acid, and liquid crystal resins.
In addition, the thickness of the film base 2 is such that the plating work for arranging the history monitor sensor 3 described above on the surface thereof can be performed, and the packaging film 1 is made of the paper pack container 10 ( It can be set to a thickness having such a strength that it can withstand bending and deformation when mounted on a mounted portion such as FIG.

  If the ground conductive layer 21 has electroconductivity, it will not specifically limit, For example, the metal net | network formed from metals, such as metal sheets, such as copper foil and aluminum foil, stainless steel, an electroconductive film | membrane etc. are mentioned. . When the ground conductive layer 21 is composed of a conductive film, the procedure may be directly formed on one surface of the dielectric layer 22 using a general-purpose printing method. However, the conductive film is usually formed on an electrical insulating sheet. After being formed, it is preferable that an electric insulating sheet is disposed and integrated on one surface of the dielectric layer 22 in a state where the conductive film is on the dielectric layer 22 side. As a method of forming a conductive film on the dielectric layer 22, for example, (1) a method of applying and drying a conductive paste containing conductive fine particles in a binder on the dielectric layer 22, and (2 ) A method of forming electrodes on the dielectric layer 22 by vapor deposition, (3) After the metal foil is laminated and integrated on the dielectric layer 22 using an adhesive or the like, unnecessary portions of the metal foil are removed by an etching method. And a method of forming an electrode.

The history monitor sensor 3 has two sets of discharge circuits 3A and 3B arranged in parallel with each other on the surface of the dielectric layer 22. In these discharge circuits 3A and 3B, one symbol 3A constitutes a non-breaking discharge circuit, and the other symbol 3B constitutes a breaking discharge circuit.
In the non-breaking discharge circuit 3A, a first capacitor 31A and a first resistor 32A are electrically connected by a printed wiring 33A, and a first voltage extraction wiring 33a for voltage measurement is provided at an end of the printed wiring 33A. . In the break discharge circuit 3B, a second capacitor 31B and a second resistor 32B are electrically connected by a printed wiring 33B, and a second voltage extraction wiring 33b for voltage measurement is provided at an end of the printed wiring 33B.

The first capacitor 31A and the second capacitor 31B are both charged when the package film 1 is manufactured.
The printed wirings 33 </ b> A and 33 </ b> B are not particularly limited as long as the printed wirings 33 </ b> A and 33 </ b> B are disposed or integrally formed on the other surface of the dielectric layer 22 and have conductivity.
Capacitors 31A and 31B, resistors 32A and 32B, and printed wirings 33A and 33B constituting such discharge circuits 3A and 3B are usually made of a thin film of a low resistance metal such as aluminum, copper, silver, or gold. For example, it can be formed by bonding with metal foil, plating, etching, or printing using conductive ink such as silver paste.

  As shown in FIG. 1, the distance L2 between the second capacitor 31B and the second resistor 32B of the break discharge circuit 3B is set larger than the distance L1 between the first capacitor 31A and the first resistor 32A of the non-break discharge circuit 3A. Has been. Between the first resistor 32A and the second resistor 32B, there is a break line K that crosses a portion 33c that connects the second capacitor 31B and the second resistor 32B in the printed wiring 33B in the break discharge circuit 3B. Yes. The fracture line K is a virtual line when the history monitor sensor 3 is used. That is, when the packaging film 1 is attached to the paper pack container 10 shown in FIGS. 3A and 3B described above, the cut line K and the break line K are arranged so as to coincide with each other. To do. The break line K only needs to cross the portion 33c of the printed wiring 33B located between the second capacitor 31B and the second resistor 32B described above. The break line K is set not to cross the printed wiring 33A of the non-breaking discharge circuit 3A.

Next, the operation of the above-described packaging film 1 mounted on the paper pack container 10 will be specifically described with reference to the drawings.
FIG. 4 shows a circuit diagram of the history monitor sensor 3 in the packaging film 1 shown in FIG. As described above, the capacitors 31A and 31B of the discharge circuits 3A and 3B are in a charged state in which charges are accumulated at the time of manufacture. The first capacitor 31A and the second capacitor 31B are discharged through the first resistor 32A and the second resistor 32B, respectively.
When the opening part 11 of the paper pack container 10 shown in FIG. 3 is opened, the second resistor 32B is separated from the second capacitor 31B by breaking at the breaking line K in the breaking discharge circuit 3B. Stops discharging.

5 and 6 show time histories of the voltages E1 and E2 in the discharge circuits 3A and 3B, respectively. That is, the horizontal axis is time t, and the vertical axis is the voltage E (E1, E2) of each capacitor 31A, 31B.
As shown in FIG. 5, from the production time t0 to the opening time t1 at which the rupture line K breaks, both the non-breaking discharge circuit 3A and the rupture are set by setting the first resistance 32A and the second resistance 32B to the same resistance value. Since the discharge circuit 3B discharges with the same discharge curve, the first voltage E1 and the second voltage E2 decrease with time.

  When the printed wiring 33B breaks at the breaking line K, the drop of the second voltage E2 of the breaking discharge circuit 3B stops at the opening time t1, and the first voltage E1 of the non-breaking discharge circuit 3A continues to be discharged. That is, the second voltage E2 of the breaking discharge circuit 3B remains unchanged at the output at the opening time t1 even after the opening time t1. Therefore, if the voltage is measured at an appropriate measurement time t2 after the opening time t1, the elapsed time (from the opening time t1 to the measurement time t2) due to the voltage difference (ΔE = E2-E1) between the first voltage E1 and the second voltage E2 ( t2-t1) can be calculated. Further, the time at the opening time t1 (the elapsed time (t1-t0) from the production time t0 to the opening time t1) can also be confirmed from the second voltage E2.

  Further, if the voltage values of the first capacitor 31A and the second capacitor 31B are different from each other, it can also be confirmed that the opening portion 11 has been opened.

  FIG. 6 shows the operation of the history monitor sensor having a configuration in which the first resistor 32A is not provided. In the case of this structure, the first voltage E1 of the non-breaking discharge circuit 3A does not change with the output at the production time t0, and the second voltage E2 of the breaking discharge circuit 3B is the second voltage E2 shown in FIG. It discharges with the same discharge curve and decreases with the passage of time. Therefore, only the elapsed time from the production time t0 to the time of use (opening time t1) can be confirmed.

Next, the operation of the above-described history monitor sensor and package film will be described in detail with reference to the drawings.
As shown in FIG. 1 to FIG. 3, in the present embodiment, a voltage drop amount (voltage difference) due to capacitor discharge is detected by a voltage detector, and a signal at the start of discharge detection is detected by the voltage detector. Since it is possible to grasp the amount of voltage drop per hour of the capacitor in advance, the elapsed time from the start of discharge detection to the predetermined measurement time based on the detected amount of voltage drop from the start of discharge detection Can be confirmed. Then, by mounting the history monitor sensor having such a configuration on, for example, the opening portion of the container, it is possible to check the opening state of the container and the elapsed time from the time of manufacture or opening.

And in this Embodiment, the log | history monitor sensor of the charge state in which the electric charge was accumulate | stored in the capacitors 31A and 31B of both discharge circuit 3A, 3B at the time of manufacture can be mounted | worn with the opening part of a container. Then, after the manufacture, the first capacitor 31A and the second capacitor 31B are discharged by the first resistor and the second resistor, respectively.
Therefore, the discharge of the second capacitor is stopped and the discharge of the second capacitor is stopped by breaking the second resistance of the break discharge circuit according to the use situation such as opening the opening portion 11 of the paper pack container 10 as in the present embodiment. By comparing the voltage with the first capacitor that is continuing, it is possible to confirm the elapsed time from the time of breakage.

  As described above, the history monitor sensor and the packaging film according to the present embodiment can detect an elapsed time after opening with a simple structure.

  Next, other embodiments using the history monitor sensor and the packaging film of the present invention will be described with reference to the accompanying drawings, but the same or similar members and parts as those in the first embodiment described above are the same. A description will be omitted using reference numerals, and a configuration different from that of the first embodiment will be described.

(Second Embodiment)
The packaging film 1A according to the second embodiment shown in FIG. 7 has a set of non-breaking discharge circuits 3A and a large number (10 sets in FIG. 7) of breaking discharge circuits 3B arranged on the film substrate 2. This is the configuration. The packaging film 1A of the present embodiment is applied to, for example, a medicine pack having a plurality of lid parts 12 (here, 10 places equal to 10 sets of break discharge circuits 3B) that are opened each time the drink is taken. can do.

Further, in the packaging film 1A of the present embodiment, an RFID tag 35 including an antenna 34 is disposed on the surface of the film base 2, and each of all the discharge circuits 3A and 3B is disposed with respect to the RFID tag 35. They are electrically connected by connection wirings 330 extending from the printed wirings 33A and 33B shown in FIG.
In each break discharge circuit 3 </ b> B, the break line K (see FIG. 4) between the capacitor and the resistor is disposed so as to coincide with the upper edge of the lid 12. That is, the lid 12 is broken at the breaking line K when the lid 12 is opened.

The RFID tag 35 is provided so as to be electrically connected to the antenna 34, and stores information related to a product (here, a medicine pack) to which the RFID tag 35 is attached. The RFID tag 35 receives predetermined signals (for example, information on medicines contained in a medicine pack (for example, manufacturer, date of production, shipping date, etc.) Information about the pack is stored, and information stored in the RFID tag 35 is read by an unillustrated reader via the antenna 34.
In addition, in the RFID tag 35, the discharge is stopped when the breakage discharge circuit 3B breaks along the break line (stop of the second voltage), the voltage of the capacitor of the non-breaking discharge circuit 3A and the voltage of the capacitor of the break discharge circuit 3B Can be received and stored.

  In the second embodiment, the unsealed state, the elapsed time since opening, and the elapsed time since manufacturing can be confirmed for each of the plurality of lid portions 12.

(Third embodiment)
Next, the history monitor sensor 3 </ b> C according to the third embodiment shown in FIG. 8 is configured to use an optical sensor and record a history repeatedly. That is, in this embodiment, the structure is different from the structure that is disposable only by charging at the time of manufacture as in the first and second embodiments described above.

The voltage detection unit of the history monitor sensor 3C according to the third embodiment includes a charging circuit 4A having a third capacitor 31C and a solar cell 36 (charge supply unit) for charging the third capacitor 31C, and a fourth capacitor 31D. And a third resistor 32D, and a charge / discharge circuit 4B provided on the fourth capacitor 31D so as to be able to be charged by the solar battery 36.
The solar cell 36 is configured to include an optical sensor (detection unit), and the on / off switching of the solar cell 36 is performed depending on the presence or absence of light. The charging circuit 4A and the charging / discharging circuit 4B are provided with voltage extraction wirings 33C and 33D, respectively.
Further, the history monitor sensor 3C includes a transistor 38 and a display unit 37 that is connected to the transistor 38 and indicates an elapsed time made of liquid crystal, electronic paper, or the like (see FIG. 9).

Next, the operation of the history monitor sensor 3C according to the third embodiment will be specifically described with reference to FIGS.
First, in the first operation S1, when the place where the solar cell 36 is arranged is bright, the solar cell 36 is turned on to generate electric power, whereby electric power is supplied to the charging circuit 4A and the third capacitor 31C is fully charged.

Next, in the second operation S2, when the place where the solar cell 36 is disposed becomes dark, the solar cell 36 is turned off, charging of the third capacitor 31C is stopped, and the voltage of the fourth capacitor 31D gradually decreases. To do. When the voltage of the third capacitor 31C becomes smaller than the first specified voltage e1 (31C <e1), the control circuit turns on the transistor 38 via the control signal b1 to charge the fourth capacitor 31D, and the display unit The display control circuit 37 is turned on, and the third capacitor 31C is discharged. Here, the capacity of the fourth capacitor 31D is set to a value sufficiently smaller than the capacity of the third capacitor 31C.
The first specified voltage e1 is 1.1V. Further, a second specified voltage e2 described later is 1.0V.

Next, in the third operation S3, when the voltage of the third capacitor 31C further decreases and the voltage of the third capacitor 31C becomes smaller than the second specified voltage e2 (31C <e2), the transistor 38 is turned off. Thereafter, the voltage supplied to the control circuit is lowered and the control circuit is also stopped, but the transistor 38 is not turned ON. Thereafter, the fourth capacitor 31D is discharged and the voltage decreases with the passage of time, and the display control circuit of the display unit 37 is turned off.
In this state, when the place where the solar cell 36 is disposed becomes bright, the third capacitor 31C is charged and the circuit operates, and the elapsed time is converted from the voltage of the fourth capacitor 31D, as shown in FIG. For example, “12345” is displayed. At this time, since the transistor 38 remains OFF, the third capacitor 31C continues to decrease.

As described above, in the third embodiment, the present invention is applied to a device that is used in a place where light hits and is not exposed to light when not in use, and the display unit 37 has an elapsed time from the previous use. Is displayed.
The display unit 37 may be omitted, and for example, the first voltage E1 and the second voltage E2 may be output externally.

  Thus, in the third embodiment, the third capacitor 31C and the fourth capacitor 31D are charged when the solar cell 36 is on, and the signal at the time of charging can be detected by the voltage detector. . Therefore, when the solar cell 36 detects light, the third capacitor 31C and the fourth capacitor 31D can be charged by accumulating charges, and the voltage at the time of charging in the fourth capacitor 31D is compared with the voltage after discharge. By this, the elapsed time from the charging time can be confirmed.

  Moreover, it can provide in the inside of books, such as a book and a magazine, for example as an application object of the history monitor sensor 3C using the solar cell 36 in 3rd Embodiment mentioned above. In this case, when the book is opened, the history monitor sensor 3C is exposed and becomes brighter, so the elapsed time (elapsed days) from the time of reading (opening) the previous time can be confirmed. In addition, for example, the use history of a room can be confirmed by installing it on a wall surface or floor surface of a room that needs light only when it is used.

  As another application example of the history monitor sensor 3C using the solar cell 36, the history monitor sensor is applied to the inside of the lid of the sealed case for food storage so that the elapsed time since the food is stored can be known. So you can prevent accidentally eating old food. In addition, it can be used to store unauthorized items and to keep track of unauthorized use by applying them inside lockers, drawers, safes, and inside doors and lids that are exposed to light when opened. The presence or absence can be confirmed.

  Further, instead of the solar cell of the third embodiment, it is also possible to use a piezoelectric element that generates electric power by vibration using, for example, a piezoelectric effect. In this case, the present invention can be applied to a usage method for confirming a usage state such as giving vibrations that are lifted or moved during use. In addition, the piezoelectric element that generates power by vibration can be applied to the above-described books and storage cases. Moreover, it can be used also for the use which confirms the custom by applying to what is used customarily in life, such as a toothbrush and sports shoes.

As described above, the embodiments of the history monitor sensor and the packaging film according to the present invention have been described. However, the present invention is not limited to the above-described embodiments, and can be appropriately changed without departing from the scope of the present invention.
In the first and second embodiments described above, an example in which a film for packaging having a history monitor sensor is attached to a paper pack container, a medicine pack, or the like is adopted, but the present invention may be applied to other usage methods. Is possible.
For example, it can be applied to the package itself, not the method of sticking. The same effect can be obtained by tearing the opening defined by a medical device or food package that has an expiration date. Also, by mounting the RFID tag on the film, power and signals are sent from the adjacent tag reader to the RFID tag, and the control unit of the RFID tag reads the value of the capacitor and transmits it to the tag reader, so that the state is confirmed remotely. You can also. With such a configuration, it is possible to find expired stocks from a large number of opened stocks of different types, and it is possible to expand to applications for cost reduction through automation, and the added value of RFID tags for conventional article management applications Can also be improved.

  In addition, it is possible to appropriately replace the components in the above-described embodiments with known components without departing from the spirit of the present invention.

DESCRIPTION OF SYMBOLS 1, 1A Package film 2 Film base material 3, 3C History monitor sensor 3A Non-breaking discharge circuit 3B Breaking discharge circuit 10 Paper pack container 11 Opening part 31A 1st capacitor 31B 2nd capacitor 31C 3rd capacitor 31D 4th capacitor 32A, 32B, 32D Resistance 33A, 33B Printed wiring 33a First voltage extraction wiring 33b Second voltage extraction wiring 36 Solar cell (charge supply unit)
37 display section 38 transistor E1 first voltage E2 second voltage K break line

Claims (5)

A history monitor sensor including a discharge circuit having a capacitor and a resistor,
A history monitor sensor, comprising: a voltage detection unit that detects a voltage drop amount due to discharging of the capacitor based on the resistor and detects a signal at the start of discharging of the capacitor. The voltage detector is
A non-breaking discharge circuit having at least the first capacitor of the first capacitor and the first resistor;
A break discharge circuit having a second capacitor and a second resistor, the second resistor provided to be breakable, and
2. The history monitor sensor according to claim 1, wherein the break discharge circuit and the non-break discharge circuit are each provided with a voltage extraction wiring. The voltage detector is
A charging circuit having a third capacitor and a charge supply unit for charging the third capacitor;
A charge / discharge circuit having a fourth capacitor and a third resistor, and provided to the fourth capacitor so as to be able to be charged by the charge supply unit,
A detection unit that switches on / off of the charge supply unit;
The history monitor sensor according to claim 1, wherein each of the charging circuit and the charging / discharging circuit is provided with a voltage extraction wiring.   The history monitor sensor according to claim 1, wherein the voltage detection unit is provided with an RFID tag. A film for packaging comprising the history monitor sensor according to any one of claims 1 to 4,
The film for packaging, wherein the history monitor sensor is integrally provided on a surface of a flexible film substrate.

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