CN108382729B - Packaging box with NFC chip and control method thereof - Google Patents

Abstract

The invention relates to the technical field of product packaging, in particular to a packaging box with an NFC chip and a control method thereof. The packaging box with the NFC chip includes a sealed box body, and further includes: a substrate adhered to the inner surface of the box body; a sensing module installed in the substrate, including a gas sensor and a humidity a sensor; an NFC chip, mounted in the substrate and connected to the sensing module; the NFC chip includes a detection module for detecting the temperature inside the box, and the detection module passes a positive temperature The temperature inside the box is obtained by calculating a temperature sensitive resistor with a coefficient and its corresponding first weight, and a temperature sensitive resistor with a negative temperature coefficient and its corresponding second weight. The invention solves the problem of accurately knowing the quality of the products in the packaging box without removing the packaging box, and improves the user experience.

Description

Packaging box with NFC chip and control method thereof

technical field

The invention relates to the technical field of product packaging, in particular to a packaging box with an NFC chip and a control method thereof.

Background technique

Intelligent packaging technology is an emerging technology branch that integrates multiple knowledge fields. It adds technology in the fields of machinery, electricity, electronics and chemistry to the ordinary packaging box, so that it not only has the traditional product packaging function, but also has some functions according to the characteristics of the packaged products and/or the needs of users. Special features, such as anti-counterfeiting features. The addition of an NFC (Near Field Communication, near field communication) chip makes the packaging box more user-friendly, makes human-computer interaction more convenient, and promotes the gradual application of smart packaging in the field of Internet of Things.

However, most of the packaging boxes with NFC chips on the market currently have relatively simple functions, which can only realize the anti-counterfeiting function of the product, and the application scope is limited. However, before purchasing a product, in addition to knowing the authenticity of the product, the user also needs to know the quality of the product in the box without removing the box, so as to avoid purchasing expired and deteriorated products. Especially in the field of food, people generally rely on the shelf life on the packaging box to judge whether the product in the box has expired. However, due to improper storage methods, it may also cause the food within the shelf life to deteriorate and become inedible. It is too one-sided to judge the quality of the food in the packaging box only by the product parameters on the packaging box, and sometimes the user may even erroneously judge the quality of the products in the packaging box and eat the spoiled food by mistake, thus causing harm to health.

Therefore, how to accurately understand the quality of the products in the packaging box without removing the packaging box is a technical problem to be solved urgently at present.

SUMMARY OF THE INVENTION

The invention provides a packaging box with an NFC chip and a control method thereof, so as to solve the problem that the prior art cannot accurately know the quality of the products in the packaging box without removing the packaging box, and improve the user experience.

In order to solve the above problems, the present invention provides a packaging box with an NFC chip, comprising a sealed box body, and further comprising: a substrate adhered to the inner surface of the box body; a sensing module mounted on the box body The substrate includes a gas sensor and a humidity sensor, the gas sensor is used to detect the gas concentration inside the box body and transmit it to the NFC chip, and the humidity sensor is used to detect the humidity inside the box body and transmit it to the NFC chip. the NFC chip; the NFC chip is installed in the substrate and connected to the sensing module; the NFC chip includes a detection module for detecting the temperature inside the box, and the detection module passes through a The temperature inside the box is obtained by calculating a temperature-sensitive resistor with a positive temperature coefficient and its corresponding first weight, and a temperature-sensitive resistor with a negative temperature coefficient and its corresponding second weight.

Preferably, the NFC chip further includes a control module and a storage module; the control module is connected to the storage module, the sensing module and the detection module, and is used for converting the received gas concentration information, humidity information and The temperature information is transmitted to the storage module for storage.

Preferably, it also includes an anti-counterfeiting label wrapped on the outer surface of the box; the NFC chip is connected to the anti-counterfeiting label, and is used to obtain the current anti-counterfeiting information of the anti-counterfeiting label and transmit it to the storage module for storage, and the The storage module also stores the initial anti-counterfeiting information of the anti-counterfeiting label.

Preferably, it further includes a strip-shaped tear opening on the box body, the strip-shaped tear opening is used to disassemble the box body, and the anti-counterfeiting label covers the strip-shaped tear opening.

Preferably, the NFC chip further includes a radio frequency module; the radio frequency module is connected to the control module, and is used for transmitting the information stored in the storage module to a mobile terminal.

Preferably, the gas sensor, the humidity sensor and the anti-counterfeiting label all include a series voltage divider circuit composed of a variable resistor and a fixed value resistor.

Preferably, it also includes a flexible battery installed in the substrate; the flexible battery is connected to the NFC chip for supplying power to the NFC chip.

Preferably, it also includes a flexible switch; the first end of the flexible switch is connected to the NFC chip, the second end is connected to the flexible battery, and the control end extends from the inside of the box to the outside of the box for controlling Whether the flexible battery is connected to the NFC chip.

In order to solve the above problems, the present invention also provides a method for controlling a packaging box with an NFC chip, including the packaging box with an NFC chip as described in any one of the above, including the following steps: the NFC chip receives a message from a mobile terminal. The NFC chip controls the sensing module to obtain the gas concentration information and relative humidity information inside the box and transmits them to the mobile terminal, and controls the detection module to obtain The temperature information inside the box is transmitted to the mobile terminal.

Preferably, the specific steps for the NFC chip to control the detection module to obtain the temperature information inside the box include:

A positive temperature coefficient thermistor and a negative temperature coefficient thermistor are provided, and both the positive temperature coefficient thermistor and the negative temperature coefficient thermistor are used to detect the temperature inside the box;

Perform linear regression processing on a plurality of standard first temperature data directly stored in the NFC chip and corresponding to the temperature sensitive resistor with the positive temperature coefficient and a plurality of temperature values inside the box body corresponding to them one-to-one, to obtain A first straight line; and a plurality of standard second temperature data directly stored in the NFC chip corresponding to the negative temperature coefficient temperature sensitive resistor and a plurality of temperature values inside the box body corresponding to it one-to-one Perform linear regression processing to obtain a second straight line;

Taking the intersection of the first straight line and the second straight line as a reference point;

Acquiring current first temperature data corresponding to the temperature-sensitive resistor with a positive temperature coefficient and current second temperature data corresponding to the temperature-sensitive resistor with a negative temperature coefficient directly stored in the NFC chip;

Substituting the current first temperature data into the first straight line to obtain a first coordinate point, and substituting the current second temperature data into the second straight line to obtain a second coordinate point;

Connecting the reference point and the first coordinate point to obtain a third straight line, and connecting the reference point and the second coordinate point to obtain a fourth straight line;

According to the difference between the first straight line and the third straight line, and the second straight line and the fourth straight line, a first weight corresponding to the temperature-sensitive resistor with a positive temperature coefficient, and a The second weight corresponding to the negative temperature coefficient thermistor;

Taking the temperature calculated according to the first weight, the second weight, the first coordinate point, and the second coordinate point as the temperature inside the box.

The present invention provides a packaging box with an NFC chip and a control method thereof. A detection module for detecting the internal temperature of the box body is integrated in the NFC chip, and a sensing module connected to the NFC chip is arranged to detect the box body. The gas concentration and humidity inside the box realize real-time detection of various parameters inside the box, which can be used to judge the quality of the products inside the box through comprehensive analysis of various parameters. Under the circumstance of accurate understanding of the quality of the products in the packaging box, users can avoid buying inferior or deteriorated products, and improve the user experience.

Description of drawings

1 is a schematic structural diagram of a first angle of a packaging box with an NFC chip in a specific embodiment of the present invention;

2 is a schematic structural diagram of a second angle of a packaging box with an NFC chip in a specific embodiment of the present invention;

3 is a structural block diagram of a packaging box provided with an NFC chip in a specific embodiment of the present invention;

4 is a schematic structural diagram of the connection between a packaging box with an NFC chip and a flexible battery in a specific embodiment of the present invention;

5 is a schematic structural diagram of the connection between the sensing module, the anti-counterfeiting label and the NFC chip in the packaging box provided with the NFC chip according to the specific embodiment of the present invention;

FIG. 6 is a flowchart of a control method for a packaging box provided with an NFC chip in a specific embodiment of the present invention.

Detailed ways

The specific embodiments of the packaging box provided with the NFC chip and the control method thereof provided by the present invention will be described in detail below with reference to the accompanying drawings.

This specific embodiment provides a packaging box with an NFC chip. Figure 1 is a schematic structural diagram of a packaging box provided with an NFC chip from a first angle in a specific embodiment of the present invention, and Figure 2 is a specific embodiment of the present invention. A schematic structural diagram of a packaging box for a chip from a second angle, FIG. 3 is a structural block diagram of a packaging box with an NFC chip in a specific embodiment of the present invention.

As shown in FIGS. 1-3 , the packaging box provided with an NFC chip provided by this specific embodiment includes a sealed box body 11 , a substrate 12 , a sensing module 13 and an NFC chip 14 . Wherein, the box body 11 constitutes an accommodating cavity for accommodating products, such as food and the like. The specific shape of the box body 11 may be set by those skilled in the art according to actual needs, and may be, but not limited to, any polyhedron or sphere. Since the deterioration and decay of the food may cause changes in various parameters in the surrounding environment, such as changes in the concentration of certain sensitive gases, the box body 11 in this embodiment is preferably a box body for packaging food.

In order to accurately know the quality of the products in the box without removing the packaging box, the packaging box provided with the NFC chip provided by this specific embodiment further includes: a substrate 12, which is adhered to the inner surface of the box body 11; The sensor module 13 is installed in the substrate 12 and includes a gas sensor 131 and a humidity sensor 132. The gas sensor 131 is used to detect the gas concentration inside the box 11 and transmit it to the NFC chip 14. The humidity sensor 132 is used to detect the humidity inside the box body 11 and transmit it to the NFC chip 14; the NFC chip 14 is installed in the substrate 12 and connected to the sensing module 13; the NFC chip 14 includes a The detection module 142 for detecting the temperature inside the box body 11, and the detection module 142 passes a positive temperature coefficient thermistor and its corresponding first weight, and a negative temperature coefficient thermistor and its corresponding first weight. The corresponding second weight is calculated to obtain the temperature inside the box body 11 . That is, in this specific embodiment, the sensing module 13 and the NFC chip connected to the substrate 12 are both located inside the box body 11 , so as to facilitate the detection of various items inside the box body 11 . parameters are measured. Moreover, the calibration and detection of the internal temperature of the box body 11 are realized by the cooperation of the temperature-sensitive resistor with a positive temperature coefficient and the temperature-sensitive resistor with a negative temperature coefficient, which improves the accuracy and reliability of temperature detection. The specific models of the gas sensor 131 and the humidity sensor 132 can be selected by those skilled in the art according to actual needs, for example, according to the properties of the products stored in the box body 11 . Not limited. The NFC chip 14 preferably has a silicon-based substrate. In order to closely adhere the substrate 12 to the inner surface of the box body 11 and enable the substrate 12 to withstand a certain degree of bending, preferably, the substrate 12 is a flexible substrate, such as a PCB (Printed Circuit Board, printed circuit board) flexible substrate.

Preferably, the NFC chip 14 further includes a control module 141 and a storage module 143; the control module 141 is connected to the storage module 143, the sensing module 13 and the detection module 142, and is used to store the received The gas concentration information, humidity information and temperature information are transmitted to the storage module 143 for storage. It is convenient for the user to check the gas concentration information, humidity information and temperature information inside the box body 11 later, and to analyze the product quality inside the box body 11 according to the above parameter information.

As shown in FIG. 3 , the NFC chip 14 in this specific embodiment further includes a power supply unit 146 and a clock unit 147 ; the power supply unit 146 is used to provide power for each electronic component in the NFC chip 14 ; the The clock unit 147 serves as the system clock of the NFC chip 14 .

Preferably, the packaging box provided with the NFC chip provided by this specific embodiment further includes an anti-counterfeiting label 15 covered on the outer surface of the box body 11 ; the NFC chip 14 is connected to the anti-counterfeiting label 15 for obtaining the The current anti-counterfeiting information of the anti-counterfeiting label 15 is transmitted to the storage module 143 for storage, and the storage module 143 also stores the initial anti-counterfeiting information of the anti-counterfeiting label 15 . In this way, by comparing the current anti-counterfeiting information of the anti-counterfeiting label 15 with the initial anti-counterfeiting information stored in the storage module 143, the user can judge the authenticity of the product inside the box 11 and whether the anti-counterfeiting label 15 has been destroy. More preferably, the packaging box provided with the NFC chip provided by this specific embodiment further includes a strip-shaped tear opening 16 located on the box body 11 , and the strip-shaped tear opening 16 is used to disassemble the box body 11 . And the anti-counterfeiting label 15 covers the strip tear opening 16 . In this way, once the box body 11 is disassembled, the anti-counterfeiting label 15 will be destroyed, thereby further improving the anti-counterfeiting effect. The specific form of the anti-counterfeiting label 15 can be set by those skilled in the art according to actual needs, such as a flexible printed encryption circuit.

Specifically, the NFC chip 14 further includes a signal acquisition module 145 , and the signal acquisition module 145 includes an analog-to-digital conversion circuit unit and an interface unit for connecting with the sensing module 13 and the anti-counterfeiting label 15 . The interface unit receives the information transmitted by the sensing module 13 and the anti-counterfeiting label 15, processes the information through the analog-to-digital conversion circuit unit, and transmits the information to the storage module 143 for storage. By integrating the signal acquisition module 145 in the NFC chip 14 , the anti-counterfeiting label 15 , the gas sensor 131 and the humidity sensor 132 can be provided with an interface directly connected to the NFC chip 14 , which simplifies the configuration of the NFC chip. The overall circuit structure in the packaging box of the chip simplifies the overall structure of the packaging box with the NFC chip.

In order to facilitate the user to intuitively, accurately and timely understand various parameter information inside the box body 11, preferably, the NFC chip 14 further includes a radio frequency module 144; the radio frequency module 144 is connected to the control module 141, using The information stored in the storage module 143 is transmitted to a mobile terminal 31 . The mobile terminal 31 may be, but not limited to, a mobile phone, a tablet computer, a notebook computer, a desktop computer, and the like. The mobile terminal 31 is preferably a mobile terminal supporting full-function NFC communication. The so-called support for full-featured NFC communication refers to support for NFC card reading, card writing, card simulation and P2P modes. Specifically, the radio frequency module 144 includes an NFC analog front-end unit and an instruction parsing unit; the NFC analog front-end unit is used to receive a data instruction sent by the mobile terminal 31 and send data to the mobile terminal 31; the instruction The parsing unit is used to parse the data command received from the mobile terminal 31 into a corresponding integrated circuit signal and transmit it to the control module 141 of the NFC chip 14 , for example, the hexadecimal signal sent by the mobile terminal 31 The instruction "2A 1B" is parsed as a "read store" operation.

FIG. 5 is a schematic structural diagram of the connection between the sensing module, the anti-counterfeiting label and the NFC chip in the packaging box provided with the NFC chip according to the specific embodiment of the present invention. Both the gas sensor 131 and the humidity sensor 132 may be, but are not limited to, resistance sensors, and those skilled in the art can select them according to actual needs. In order to achieve accurate detection of the parameters inside the box body 11 , preferably, the gas sensor 131 , the humidity sensor 132 and the anti-counterfeiting label 15 all include a series voltage divider composed of a variable resistor and a fixed-value resistor. circuit.

Specifically, as shown in FIG. 5 , the anti-counterfeiting label 15 includes a series voltage divider circuit composed of a first variable resistor R1 and a first constant-value resistor R2. The series voltage divider of the first constant value resistor R2 is connected to the signal acquisition module 145 in the NFC chip 14 through a wire lead-out interface, that is, the voltage V _{out_1} at the series voltage divider is transmitted to the signal acquisition module 145 . For example: if the ratio of the initial resistance value of the first variable resistor R1 to the resistance value of the first constant value resistor R2 is R1:R2=4:1, then V _{out_1} =R2/(R1+R2)= 1/5*Vcc, converted to binary code, is 00110011; if R1:R2=1:4, then V _{out_1} =R2/(R1+R2)=4/5*Vcc, converted to binary code, it is 11001100. Before the product in the packaging box is sold, the binary code is set as the initial anti-counterfeiting information to be stored in the storage module 143. When the current anti-counterfeiting information (ie the current binary code) read by the user through the NFC chip 14 and the When the initial anti-counterfeiting information stored in the storage module 143 is inconsistent, it can be confirmed that the anti-counterfeiting label 15 is damaged.

Similarly, the gas sensor 131 includes a series voltage divider circuit composed of a second variable resistor R3 and a second fixed-value resistor R4, wherein the second variable resistor R3 is a resistor sensitive to gas concentration, and R4 It is a fixed-value resistor that is not affected by the gas concentration; at the series voltage divider between the second variable resistor R3 and the second fixed-value resistor R4, a wire is used to lead out the interface and the signal acquisition in the NFC chip 14 The modules 145 are connected to each other, that is, the voltage V _{out_2} at the series voltage divider is transmitted to the signal acquisition module 145 . For example: before the product in the box is sold, the ratio of the initial resistance of the second variable resistor R3 to the resistance of the second fixed-value resistor R4 is R3:R4=1:1, then V _{out_2} = R4/(R3+R4)=1/2*Vcc, the binary code is 01111111, and the binary code is also stored in the storage module 143; when the product is stored in the box 11 for a period of time , the product inside the box body 11 will release the sensitive gas, so that the concentration of the sensitive gas inside the box body 11 will increase, and the corresponding resistance value of the second variable resistor R3 will change, which will eventually lead to V _{If out_2} changes, the binary code corresponding to the gas sensor 131 will also change accordingly. Generally speaking, the binary code of the gas sensor 131 has a one-to-one correspondence with the concentration of the sensitive gas inside the box 11 , and the correspondence can be confirmed by means of linear fitting. The user obtains the current binary code information of the gas sensor 131 stored in the storage module 143 in the NFC chip 14 through the mobile terminal 31 , and converts it into the gas concentration information of the sensitive gas and displays it on the display screen of the mobile terminal 31 . . The humidity sensor 132 includes a series voltage divider circuit composed of a third variable resistor R5 and a third constant value resistor R6, wherein the third variable resistor R5 is a resistor sensitive to humidity, and the third constant value resistor R5 is a resistor sensitive to humidity. The value resistor R6 is a constant value resistor that is not sensitive to humidity; at the series voltage divider of the third variable resistor R5 and the third constant value resistor R6 The signal acquisition module 145 is connected to each other, that is, the voltage V _{out_3} at the series voltage divider is transmitted to the signal acquisition module 145 . The specific detection method is similar to that of the gas sensor 131 , which is not repeated here.

FIG. 4 is a schematic structural diagram of the connection between a packaging box with an NFC chip and a flexible battery in a specific embodiment of the present invention. Preferably, as shown in FIG. 4 , the packaging box provided with the NFC chip provided by this specific embodiment further includes a flexible battery 41 installed in the substrate 12 ; the flexible battery 41 is connected to the NFC chip 14 and used for for supplying power to the NFC chip 14 . The flexible battery 41 is used to supply power to the NFC chip 14 . Since the battery is flexible, the battery can fit more closely with the inner surface of the box body 11 and is not limited by the shape of the box body 11 . The flexible battery 41 may be, but is not limited to, a flexible printed thin film battery. Specifically, the substrate 12 is provided with a first interface 45 connected to the NFC chip 14 and a second interface 44 connected to the sensing module 13 and the anti-counterfeiting label 15. The conductive lines 43 are used for In order to realize the electrical connection between the first interface 45 and the second interface 44 .

Preferably, as shown in FIG. 4 , the packaging box provided with the NFC chip provided by this specific embodiment further includes a flexible switch 42 ; the first end of the flexible switch 42 is connected to the NFC chip 14 , and the second end is connected to the flexible switch 42 . The battery 41 and the control terminal extend from the inside of the box body 11 to the outside of the box body 11 , and are used to control whether the flexible battery 41 and the NFC chip 14 are connected. By setting the flexible switch 41 , the user can turn on the flexible battery 41 and the NFC chip 14 only when the user needs to detect various parameters inside the box body 11 , so as to prevent the flexible battery 41 from being disconnected. Energy waste caused by intermittently supplying power to the NFC chip 14 .

Not only that, this specific embodiment also provides a method for controlling a packaging box with an NFC chip. FIG. 6 is a flowchart of a control method for a packaging box with an NFC chip in the specific embodiment of the present invention. As shown in FIG. 6 , the method for controlling a packaging box with an NFC chip provided by this specific embodiment includes the packaging box with an NFC chip as described in any one of the above, and further includes the following steps:

Step S61, the NFC core 14 receives an instruction from a mobile terminal 31 to acquire the internal parameters of the box body 11;

Step S62, the NFC chip 14 controls the sensing module 13 to obtain the gas concentration information and relative humidity information inside the box body 11 and transmits them to the mobile terminal 31, and controls the detection module 142 to obtain the box body 11 The internal temperature information is transmitted to the mobile terminal 31 .

For example, when the user needs to acquire various parameters inside the box 11 to detect the quality of the products inside the box 11 , the acquired parameters are sent to the NFC chip 14 through the mobile terminal 31 . instruction; the NFC chip 14 receives the instruction through the radio frequency module 144, and controls the detection module 142 integrated on the NFC chip 14 and the sensor connected to the NFC chip 14 according to the received instruction The module 13 starts to collect various parameters inside the box body 11; after completing the collection of various parameters, the NFC chip 3 stores the collected various parameters in the storage module 143 and passes the The radio frequency module 144 is transmitted to the mobile terminal 31 . The mobile terminal 31 can directly display the various parameters transmitted by the NFC chip 14 in the form of text or graphs on its display interface, and can also analyze and process the various parameters transmitted by the NFC chip 14 and then display the parameters. The above-mentioned movement is displayed on the display interface of the terminal 31 .

In order to realize the storage of different types of data to improve the efficiency of data storage and subsequent data recall, preferably, the storage module 143 includes a parameter storage unit, an anti-counterfeiting information storage unit and a user-defined storage unit; the parameter storage unit Used to store the initial parameter information and currently detected parameter information of the gas sensor 131, the humidity sensor 132 and the detection module 142 respectively, such as the initial binary code information of the gas sensor 131 and the currently detected binary code information. coding information; the anti-counterfeiting information storage unit is used to store the initial anti-counterfeiting information and current anti-counterfeiting information of the anti-counterfeiting label 15; The product name, manufacturer name, production date, product serial number and other information inside the box body 11 can improve the use flexibility of the storage module 143 .

In order to achieve accurate measurement of the temperature information inside the box body 11, preferably, the specific steps for the NFC chip 14 to control the detection module 142 to obtain the temperature information inside the box body 11 include:

(S62-1) Provide a positive temperature coefficient thermistor and a negative temperature coefficient thermistor, both the positive temperature coefficient thermistor and the negative temperature coefficient thermistor are used to detect the box internal body temperature;

(S62-2) Directly store in the NFC chip a plurality of standard first temperature data corresponding to the positive temperature coefficient temperature sensitive resistor and a plurality of the standard first temperature data corresponding to the plurality of standard first temperature data one-to-one The temperature value inside the box is subjected to linear regression processing to obtain a first straight line; and a plurality of standard second temperature data corresponding to the temperature sensitive resistor with negative temperature coefficient directly stored in the NFC chip and a plurality of The standard second temperature data is one-to-one corresponding to a plurality of temperature values inside the box body to perform linear regression processing to obtain a second straight line;

(S62-3) using the intersection of the first straight line and the second straight line as a reference point;

(S62-4) Acquire current first temperature data corresponding to the positive temperature coefficient thermistor and current second temperature data corresponding to the negative temperature coefficient thermistor directly stored in the NFC chip ;

(S62-5) Substituting the current first temperature data into the first straight line to obtain a first coordinate point, and substituting the current second temperature data into the second straight line to obtain a second coordinate point;

(S62-6) connecting the reference point and the first coordinate point to obtain a third straight line, and connecting the reference point and the second coordinate point to obtain a fourth straight line;

(S62-7) Obtaining a first weight corresponding to the positive temperature coefficient thermistor according to the difference between the first straight line and the third straight line, and the second straight line and the fourth straight line , and a second weight corresponding to the negative temperature coefficient thermistor;

(S62-8) Using the temperature calculated according to the first weight, the second weight, the first coordinate point, and the second coordinate point as the temperature inside the box.

Specifically, the resistance value R of the temperature sensitive resistor is linearly related to the temperature T, and those skilled in the art can know from the common technical knowledge mastered by them that the storage module in the NFC chip (for example, EEPROM (Electrically Erasable Programmable read only) memory,) Electrically Erasable Programmable Read-Only Memory) directly stored temperature data (including the temperature data Sensor_M (hereinafter referred to as M) corresponding to the temperature-sensitive resistor with a positive temperature coefficient and the temperature corresponding to the temperature-sensitive resistor with a negative temperature coefficient The reciprocal of the data Sensor_P (hereinafter referred to as P)) has a linear relationship with the temperature T, that is, 1/M∝T, 1/P∝T, wherein the temperature data is related to the frequency. Based on the above principles, after performing linear regression (linear function) processing on multiple M-T data and multiple P-T data, the following two straight lines are obtained respectively:

l _m : y= _km x+b _m

l _p : y=k _p x+b _p

In the formula, x represents the temperature T; y represents the temperature data related to the temperature sensitive resistance directly read inside the NFC chip (that is, the temperature data M corresponding to the temperature sensitive resistance with a positive temperature coefficient and the temperature sensitive resistance with a negative temperature coefficient). The temperature data P) corresponding to the resistance; l _m represents the straight line corresponding to the temperature sensitive resistor with positive temperature coefficient, l _p represents the straight line corresponding to the thermistor with negative temperature coefficient; k represents the slope of the straight line; b represents the straight line and the y-axis intercept. Since k _m and _{k p} have opposite signs, there must be an intersection O(x ₀ , y ₀ ) between the two straight lines lm and _lp , and this intersection is the reference point. After that, the following procedure is used to calculate the internal temperature of the box:

(1) After the NFC chip 14 controls the detection module 142 to turn on temperature detection and sampling, a group of (y _m , y _p ) data will be obtained in the corresponding storage location in the NFC chip;

(2) y _p will be substituted into the straight line equation l _p to calculate x _p ;

(3) (x _p , y _p ) denote the slope of the straight line l ₁ obtained by connecting the line with O(x ₀ , y ₀ ) as k ₁ ;

μ_p越大，说明l₁与l_p偏差程度越大，负温度系数的温敏电阻对于温度的权重就越小；(4) The deviation between k ₁ and k _p is recorded as

The greater the μ _p , the greater the deviation between l ₁ and l _p , and the smaller the weight of the negative temperature coefficient thermistor to the temperature;

(5) repeat the above-mentioned steps (2)-(3), calculate the straight line l ₂ and the corresponding slope k ₂ , and repeat the above-mentioned step (4) to calculate the deviation μ _m between k ₂ and _km ;

和与负温度系数的温敏电阻对应的第二权重

(6) Calculate the first weight corresponding to the temperature sensitive resistor with the positive temperature coefficient

and the second weight corresponding to the negative temperature coefficient thermistor

(7) The temperature inside the box body T= _wp · _xp + _wm · _xm is obtained by final calculation.

The packaging box provided with the NFC chip and the control method thereof provided by this specific embodiment, the detection module for detecting the internal temperature of the box body is integrated in the NFC chip, and the sensing module connected with the NFC chip is arranged to detect the The gas concentration and humidity inside the box body realize real-time detection of various parameters inside the box body, which can be used to judge the quality of the products inside the box body through comprehensive analysis of various parameters. In the case of the packaging box, it can accurately understand the quality of the products in the packaging box, prevent users from buying inferior or deteriorated products, and improve the user experience.

The above are only the preferred embodiments of the present invention. It should be pointed out that for those skilled in the art, without departing from the principles of the present invention, several improvements and modifications can also be made, and these improvements and modifications should also be regarded as It is the protection scope of the present invention.

Claims (6)

1. The utility model provides a packing carton that possesses NFC chip, includes a sealed box body, its characterized in that still includes:

the substrate is adhered to the inner surface of the box body and is a flexible substrate;

the anti-counterfeit label is coated on the outer surface of the box body;

the sensing module is arranged in the substrate and comprises a gas sensor and a humidity sensor, the gas sensor is used for detecting the gas concentration inside the box body and transmitting the gas concentration to the NFC chip, and the humidity sensor is used for detecting the humidity inside the box body and transmitting the humidity to the NFC chip;

the NFC chip is arranged in the substrate and is connected with the sensing module; the NFC chip comprises a detection module for detecting the temperature inside the box body, the detection module calculates the temperature inside the box body through a temperature-sensitive resistor with a positive temperature coefficient and a first weight corresponding to the temperature-sensitive resistor, and a temperature-sensitive resistor with a negative temperature coefficient and a second weight corresponding to the temperature-sensitive resistor, and the product quality inside the box body is analyzed through the gas concentration inside the box body, the humidity inside the box body and the temperature inside the box body, so that the product quality inside the packing box can be accurately known under the condition that the packing box is not dismounted; the gas sensor, the humidity sensor and the anti-counterfeit label all comprise series voltage-dividing circuits formed by variable resistors and fixed value resistors;

the flexible battery is arranged in the substrate, is connected with the NFC chip and is used for supplying power to the NFC chip;

flexible switch, flexible switch's first end is connected NFC chip, second end are connected flexible battery, control end are followed the inside extension of box body reaches the box body is outside, be used for control flexible battery with whether the NFC chip switches on for the user is in need right when the inside parameter of box body detects, just switch on flexible battery with the NFC chip avoids because of flexible battery does incessantly do the energy that the NFC chip power supply leads to is extravagant.

2. The packaging box with the NFC chip according to claim 1, wherein the NFC chip further comprises a control module and a storage module; the control module is connected with the storage module, the sensing module and the detection module and used for transmitting the received gas concentration information, the received humidity information and the received temperature information to the storage module for storage.

3. The packaging box with the NFC chip according to claim 2, wherein the NFC chip is connected with the anti-counterfeit label and used for acquiring current anti-counterfeit information of the anti-counterfeit label and transmitting the current anti-counterfeit information to the storage module for storage, and initial anti-counterfeit information of the anti-counterfeit label is further stored in the storage module.

4. The packaging box with the NFC chip according to claim 3, further comprising a strip-shaped tearing opening located on the box body, wherein the strip-shaped tearing opening is used for disassembling the box body, and the anti-counterfeit label covers the strip-shaped tearing opening.

5. The packaging box with the NFC chip according to claim 3, wherein the NFC chip further comprises a radio frequency module; the radio frequency module is connected with the control module and used for transmitting the information stored in the storage module to a mobile terminal.

6. A method for controlling a package provided with an NFC chip, comprising the package provided with an NFC chip according to any one of claims 1 to 5, comprising the steps of:

the NFC chip receives an instruction sent by a mobile terminal for acquiring the internal parameters of the box body;

the NFC chip controls the sensing module to acquire gas concentration information and relative humidity information in the box body and transmit the information to the mobile terminal, and controls the detection module to acquire temperature information in the box body and transmit the information to the mobile terminal;

the specific steps of the NFC chip controlling the detection module to acquire the temperature information inside the box body comprise:

providing a temperature-sensitive resistor with a positive temperature coefficient and a temperature-sensitive resistor with a negative temperature coefficient, wherein the temperature-sensitive resistor with the positive temperature coefficient and the temperature-sensitive resistor with the negative temperature coefficient are both used for detecting the temperature in the box body;

performing linear regression processing on a plurality of standard first temperature data which are directly stored in the NFC chip and correspond to the temperature sensitive resistor with the positive temperature coefficient and a plurality of temperature values inside the box body which correspond to the standard first temperature data one by one to obtain a first straight line; performing linear regression processing on a plurality of standard second temperature data which are directly stored in the NFC chip and correspond to the temperature sensitive resistors with negative temperature coefficients and a plurality of temperature values inside the box bodies which correspond to the standard second temperature data one by one to obtain a second straight line;

taking an intersection point of the first straight line and the second straight line as a reference point;

acquiring current first temperature data which are directly stored in the NFC chip and correspond to the temperature-sensitive resistor with the positive temperature coefficient, and current second temperature data which correspond to the temperature-sensitive resistor with the negative temperature coefficient;

substituting the current first temperature data into the first straight line to obtain a first coordinate point, and substituting the current second temperature data into the second straight line to obtain a second coordinate point;

connecting the reference point and the first coordinate point to obtain a third straight line, and connecting the reference point and the second coordinate point to obtain a fourth straight line;

obtaining a first weight corresponding to the temperature-sensitive resistor with the positive temperature coefficient and a second weight corresponding to the temperature-sensitive resistor with the negative temperature coefficient according to the difference between the first straight line and the third straight line and the difference between the second straight line and the fourth straight line;

and calculating according to the first weight, the second weight, the first coordinate point and the second coordinate point to obtain the temperature serving as the temperature inside the box body.

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