KR20240042922A - Nfc communication based passive type user-specific sensory-temperature measurement tag and system including the same - Google Patents

Abstract

According to embodiments of the present invention, it is an NFC communication-based passive type user-perceived temperature measurement tag, which includes a sensing circuit unit that is driven by power received from an external reader to sense temperature and humidity values, and the temperature and humidity values. An NFC communication-based passive type user-perceived temperature measurement tag is provided, including an MCU that receives input, an antenna unit that receives power and signals from the external reader, and transmits the temperature and humidity values to the external reader.

Description

NFC communication-based passive type user-perceived temperature measurement tag and system {NFC COMMUNICATION BASED PASSIVE TYPE USER-SPECIFIC SENSORY-TEMPERATURE MEASUREMENT TAG AND SYSTEM INCLUDING THE SAME}

The present invention relates to a passive perceived temperature measurement tag for measuring real-time perceived temperature for each user, and more specifically, to a passive type perceived temperature measurement tag and system for each user based on NFC communication.

Baekyeopsang, which refers to a white wooden box in the shape of a small house equipped with weather observation equipment to observe temperature and humidity, is placed on a lawn or meadow at a height of 1.5m and measures the highest/lowest temperature and humidity in a well-ventilated condition without direct sunlight. It is insufficient to provide standards that can measure the impact of damage to animals and plants. Therefore, the Korea Meteorological Administration provides the perceived temperature in 3-hour increments from November to March, and the heat index by town, myeon, and dong in 3-hour increments from June to September.

However, in the case of perceived temperature, data is received at 0 a.m., 3 a.m., 6 a.m., etc., and heat index is received at 12 a.m., 3 a.m., 6 a.m., so the wind volume increases at 1 a.m. in winter or during the day in summer. If the amount of sunlight increases at 1 o'clock, it is difficult to expect effective decision-making in response to heat wave or cold wave disasters with only the information provided.

In this way, when only a part of the total desired value is provided and the remaining value needs to be obtained, a series of processes are performed to obtain an approximate function that satisfies the given data from the observed data and use this equation to obtain the function value for the given variable. Interpolation can be used.

Interpolation methods include linear interpolation, which simply obtains and connects a linear function for each data section, polynomial interpolation, which calculates the estimated value with a polynomial of degree 2 or higher, and spline interpolation, which has a curve equation for each section. Because linear interpolation has discontinuities in each data, it does not take into account curve functions, resulting in large errors in estimated values. Polynomial interpolation, as the degree of the polynomial increases, the number of data points increases, making calculations more complicated and the polynomial changing a lot depending on the data points. It is difficult to expect the correct value.

Therefore, it is necessary to make effective decisions to respond to disasters such as heat waves or cold waves by improving the accuracy of estimating perceived temperature for each user by compensating for these shortcomings.

The present invention was created to solve the above-mentioned problems. The purpose of the present invention is to predict the perceived temperature more accurately and individually based on the calorie consumption value of each user rather than using only simple weather information in deriving perceived temperature data. It improves the accuracy of estimates in preparation for technology, prevents smoothing of environmental information by reflecting changes in environmental information in estimates, and minimizes damage and data by generating data that can be realistic and real-time estimated compared to existing technologies. is to ensure reliability.

The technical problems of the present invention are not limited to the technical problems mentioned above, and other technical problems not mentioned can be clearly understood by those skilled in the art from the description below.

In order to solve this problem, according to an embodiment of the present invention, an NFC communication-based passive type user-perceived temperature measurement tag includes a sensing circuit unit that is driven by power received from an external reader to sense temperature and humidity values; An MCU (Micro Controller Unit) that receives the temperature and humidity values; and an antenna unit that receives power and signals from the external reader and transmits the temperature and humidity values to the external reader. An NFC communication-based passive type user-perceived temperature measurement tag is provided.

The MCU includes a plurality of analog-digital converters (ADC) and a multiplexer (MUX; MUltipleXer), and the ADC and MUX are connected to a plurality of NTC thermistors disposed in a plurality of different areas of the user's body. A first ADC and a first MUX for transmitting a plurality of temperature values to the MCU; and

A second ADC and a second MUX for transmitting at least one humidity value from at least one humidity sensor disposed in at least one region among the plurality of different regions of the user's body to the MCU. .

Each of the plurality of NTC thermistors includes: a first non-variable resistor, one end of which is connected to the driving voltage node; a second non-variable resistor, one end of which is connected to the driving voltage node and connected in parallel with the first non-variable resistor; a first variable resistor whose end is connected in series to the other end of the first non-variable resistor and whose other end is grounded; a second variable resistor, one end of which is connected in series to the other end of the second non-variable resistor, and the other end of which is grounded; a first measurement voltage node located at a contact point between the other end of the first non-variable resistor and one end of the first variable resistor and connected to the (-) input terminal of the amplifier; and a second measurement voltage node located at the contact point of the other end of the second non-variable resistor and one end of the second variable resistor and connected to the (+) input terminal of the amplifier.

Each of the first variable resistor and the second variable resistor is a first thermistor, and the external reader or a management server capable of communicating with the external reader is based on each of the first and second sensing voltage values. Thus, the first temperature value in the space where the first thermistor is disposed and the second temperature value in the space where the second thermistor is disposed are calculated.

According to embodiments of the present invention, sufficiently precise sensing values can be measured for individual multi-channels even in a passive perceived temperature measurement tag environment without a separate power source (i.e., a low-power environment).

In addition, according to embodiments of the present invention, single-channel/multi-channel perceived temperature is measured by unifying the MCU used in the conventional single-channel perceived temperature measurement tag and the MCU of the multi-channel perceived temperature measurement tag according to embodiments of the present invention. Development and production management costs for tags can be dramatically reduced.

The effects according to the technical idea of the present disclosure are not limited to the effects mentioned above, and other effects not mentioned can be clearly understood by those skilled in the art from the description below.

1 is a diagram conceptually showing the configuration of a perceived temperature measurement tag according to some embodiments of the present invention.
Figure 2 is a diagram illustrating a temperature management system employing a perceived temperature measurement tag according to some embodiments of the present invention.
Figure 3 is a diagram for explaining a method of sensing and managing temperature information for each channel in a temperature management system according to some embodiments of the present invention.
Figure 4 is a diagram showing the circuit configuration of a perceived temperature measurement tag according to some embodiments of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the attached drawings. The advantages and features of the present invention and methods for achieving them will become clear by referring to the embodiments described in detail below along with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below and may be implemented in various different forms. The present embodiments are merely intended to ensure that the disclosure of the present invention is complete, and that the present invention is not limited to the embodiments disclosed below and is provided by those skilled in the art It is provided to fully inform those who have the scope of the invention, and the present invention is only defined by the scope of the claims. Like reference numerals refer to like elements throughout the specification.

Unless otherwise defined, all terms (including technical and scientific terms) used in this specification may be used with meanings that can be commonly understood by those skilled in the art to which the present invention pertains. Additionally, terms defined in commonly used dictionaries are not interpreted ideally or excessively unless clearly specifically defined.

Additionally, in this specification, the singular form may also include the plural form unless specifically stated in the phrase. As used herein, “comprises” and/or “comprising” refers to the presence of one or more other components, steps, operations and/or elements. or does not rule out addition.

The perceived temperature measurement tag of the present invention is a passive type perceived temperature measurement tag that does not have its own power source (e.g., battery). A single perceived temperature measurement tag serves to sense temperature and humidity values and transmit them to the reader. can be performed. For example, a perceived temperature measurement tag may be implemented to include a plurality of temperature sensors for measuring the temperature and humidity of two or more different areas.

Figure 1 is a diagram conceptually showing the configuration of a perceived temperature measurement tag according to some embodiments of the present invention, and Figure 2 is an exemplary temperature management system employing a perceived temperature measurement tag according to some embodiments of the present invention. , and FIG. 3 is a diagram for explaining a method of sensing and managing temperature information for each channel in a temperature management system according to some embodiments of the present invention, and FIG. 4 is a diagram showing a method of sensing and managing temperature information for each channel in a temperature management system according to some embodiments of the present invention. This diagram shows the circuit configuration of the perceived temperature measurement tag.

Referring to Figures 1 to 4, the NFC communication-based passive type user-perceived temperature measurement tag includes a sensing circuit unit (NTC, HS, ADC, MUX) that is driven by power received from an external reader and senses temperature and humidity values. , an MCU (Micro Controller Unit) that receives the temperature and humidity values, and an RF module and antenna unit (ANT) that receive power and signals from the external reader and transmit the temperature and humidity values to the external reader. Includes.

The internal configuration of the perceived temperature measurement tag is shown conceptually for convenience of explanation, and is of course not limited thereto. In addition, of course, the inside of the perceived temperature measurement tag may include additional components (excluding the battery) other than the sensing circuit, MCU, and antenna, which will be described later.

The MCU includes a plurality of analog-digital converters (ADC) and a multiplexer (MUX; MUltipleXer), and the ADC and MUX are connected to a plurality of NTC thermistors disposed in a plurality of different areas of the user's body. A first ADC and a first MUX for transmitting a plurality of temperature values to the MCU; and

A second ADC and a second MUX for transmitting at least one humidity value from at least one humidity sensor disposed in at least one region among the plurality of different regions of the user's body to the MCU. .

Here, the ADC and MUX are described as being included in the MCU, but this is only a conceptual classification, and it goes without saying that the ADC and MUX may be included in the above-described sensing circuit unit.

Meanwhile, each of the plurality of NTC thermistors includes a first non-variable resistor, one end of which is connected to the driving voltage node, and a second non-variable resistor, one end of which is connected to the driving voltage node and connected in parallel with the first non-variable resistor. A non-variable resistor, one end of which is connected in series to the other end of the first non-variable resistor, the other end of which is grounded, and one end of which is connected in series to the other end of the second non-variable resistor, and the other end of which is connected in series to the other end of the second non-variable resistor. A second variable resistor that is grounded, a first measurement voltage node located at the contact point of the other end of the first non-variable resistor and one end of the first variable resistor and connected to the (-) input terminal of the amplifier, and 2. It is characterized by including a second measurement voltage node located at the contact point of the other end of the non-variable resistor and one end of the second variable resistor and connected to the (+) input terminal of the amplifier.

Here, each of the first variable resistor and the second variable resistor is a first thermistor, and the external reader or a management server capable of communicating with the external reader determines the first sensing voltage value and the second sensing voltage value, respectively. Based on this, the first temperature value in the space where the first thermistor is disposed and the second temperature value in the space where the second thermistor is disposed are calculated.

Referring to FIG. 2, the sensing circuit unit of the perceived temperature measurement tag can measure the user's temperature and humidity in a plurality of sensing areas (S1, S2, and S3).

Specifically, in the first sensing area (S1), the first temperature value and the first humidity value of the user's crown area, and in the second sensing area (S2), the second temperature value and the second humidity value of the user's armpit area, 3 In the sensing area S3, the third temperature value of the user's fingernail area can be sensed.

For this purpose, a first NTC thermistor (NTC1) and a first humidity sensor (HS1) may be disposed in the first sensing area (S1), and a second NTC thermistor (NTC2) and a second humidity sensor (HS1) may be placed in the second sensing area (S2). A humidity sensor (HS2) may be disposed, and a third NTC thermistor (NTC3) may be disposed in the third sensing area (S3).

MUX can perform basic calculations on sensing values from each sensor unit and transmit them to the MCU.

Here, the first MUX (MUX1) is the average value of the three data when the deviation between the measured values of the first to third NTC thermistors is less than 3 degrees Celsius, and the measurement of the first to third NTC thermistors If the deviation between values is more than 3 degrees Celsius, the average value of the three data and the two deviation values can be transmitted to the MCU.

The second MUX (MUX2) can transmit only the average value of the measured values of the first and second humidity sensors to the MCU.

The MCU can transmit the data received from the MUXs to the reader (TR) through the NFC module, and the reader (TR) can transmit and display the user's perceived temperature calculated on the user wireless terminal based on the received data. . Alternatively, the reader (TR) may simply share data with the management server through a mobile communication module, and the management server may calculate the user's perceived temperature and transmit it to the reader.

Meanwhile, the MCU employed in the perceived temperature measurement tags of the present invention is an MCU that has an interface for short-distance wireless communication such as RFID and NFC. The MCU includes at least one operational amplifier (OP-AMP) and at least one analog-amplifier (ADC). Digital Converter) It is an MCU that includes an input port.

Although not shown, the sensing circuit unit includes at least two sets of non-variable/variable resistors connected in series from the driving voltage node (Vdd) to the ground terminal.

Specifically, the sensing circuit has a first non-variable resistor (R1), one end of which is connected to the driving voltage node (Vdd), and one end of which is connected to the driving voltage node (vdd) and connected in parallel with the first non-variable resistor (R1). a second non-variable resistor (R2), one end of which is connected in series to the other end of the first non-variable resistor (R1) and the other end of which is grounded, a first variable resistor (Th1), one end of which is the second non-variable resistor (R2) ) is connected in series to the other end of the second variable resistor (Th2), the other end of which is grounded, and is located at the contact point of the other end of the first non-variable resistor (R1) and one end of the first variable resistor (Th1), and is connected to the amplifier (i.e. OP It is located at the contact point of the first measurement voltage node (V ^- _in ) connected to the (-) input terminal of -AMP) and the other end of the second non-variable resistor (R2) and one end of the second variable resistor (Th2), but OP -It may include a second measurement voltage node (V ⁺ _in ) connected to the (+) input terminal of the AMP.

In some embodiments, each of the first variable resistor Th1 and the second variable resistor Th2 may be a thermistor whose resistance characteristics change depending on temperature. For example, each of the first variable resistor Th1 and the second variable resistor Th2 may be a negative temperature coefficient thermistor (NTC), a positive temperature coefficient thermistor (PTC), or a critical temperature resistor (CTR).

In ^this case, the antenna unit 30 ^of the perceived _temperature measurement tag 1 receives voltage values (more _precisely , After measurement, the digitized voltage values within the MCU) can be transmitted to an external reader, and the external reader or a management server capable of communicating with the external reader detects the first sensing voltage value and the second sensing voltage based on a preset voltage-temperature conversion table. From each value, the first temperature value in the space where the first thermistor is placed and the second temperature value in the space where the second thermistor is placed can be calculated.

Meanwhile, the perceived temperature measurement tag MCU of the present invention is preferably an MCU capable of digitally converting each analog value sensed for each channel with a resolution of 8 bits to 50 bits. In this case, even in a low power environment, the OP-AMP's V ⁺ _in , V ^- Sufficiently precise temperature measurement is possible even without using the _in difference value amplification method.

The reader (TR) and the management server can communicate data with each other in real time through an information and communication network. Information and communication networks include, for example, wired networks such as Local Area Network (LAN), Wide Area Network (WAN), or Value Added Network (VAN), mobile radio communication networks, etc. It can be implemented with all types of wireless networks, such as satellite communication networks, Bluetooth, Wibro (Wireless Broadband Internet), and HSDPA (High Speed Downlink Packet Access).

The management server is a server device that includes a workstation with a high-performance processor and large storage space to store and process information input from the reader and process the process without delay by responding to requests from each terminal. can be used.

For example, the reader may be implemented as various smart devices such as smartphones, smart notes, tablet PCs, smart cameras, smart TVs, and wearable computers, and may be implemented through PCS (Personal Communication System) and GSM (Global System for Mobile communications). ), PDC (Personal Digital Cellular), PHS (Personal Handyphone System), PDA (Personal Digital Assistant), IMT (International Mobile Telecommunication)-2000, CDMA (Code Division Multiple Access)-2000, W-CDMA (W-Code Division) Multiple Access), Wibro (Wireless Broadband Internet) terminal, etc. may be implemented by all types of handheld wireless communication devices, such as desktops, laptops, and laptops equipped with a web browser. It may also be implemented by (laptop), etc.

Alternatively, the reader may be a small dedicated terminal embedded in the user's clothing or hat, such as the reader (TR) shown in FIG. 2.

The reader may be equipped with a recording medium that can be read and written by a computing device on which a communication unit that communicates with the management server to implement the above-mentioned functions and an application program that displays each function through a user interface are recorded. .

The reader can perform periodic tagging on the perceived temperature measurement tag. In this case, the perceived temperature measurement tag can obtain power for driving the perceived temperature measurement tag through RF field energy generated from the antenna of the tag reader.

The sensor unit of the perceived temperature measurement tag acquires sensing values for each channel using the acquired power, and the MCU transmits the acquired sensing values for each channel to the NFC interface, and can transmit the temperature and humidity values delivered through the antenna to the tag reader. .

Those skilled in the art related to the present embodiment will understand that the above-described substrate can be implemented in a modified form without departing from the essential characteristics. Therefore, the disclosed methods should be considered from an explanatory rather than a restrictive perspective. The scope of the present invention is indicated in the claims rather than the foregoing description, and all differences within the equivalent scope should be construed as being included in the present invention.

Claims (4)

As an NFC communication-based passive type user-perceived temperature measurement tag,
A sensing circuit unit driven by power received from an external reader to sense temperature and humidity values;
An MCU (Micro Controller Unit) that receives the temperature and humidity values; and
An antenna unit that receives power and signals from the external reader and transmits the temperature and humidity values to the external reader. An NFC communication-based passive type user-perceived temperature measurement tag.
According to claim 1,
The MCU includes a plurality of analog-digital converters (ADC) and a multiplexer (MUX; MUltipleXer),
The ADC and MUX are,
A first ADC and a first MUX for transmitting a plurality of temperature values from a plurality of NTC thermistors disposed in a plurality of different areas of the user's body to the MCU; and
a second ADC and a second MUX for transmitting at least one humidity value from at least one humidity sensor disposed in at least one region among the plurality of different regions of the user's body to the MCU; , NFC communication-based passive type user-perceived temperature measurement tag.
According to clause 2,
Each of the plurality of NTC thermistors,
a first non-variable resistor, one end of which is connected to the driving voltage node;
a second non-variable resistor, one end of which is connected to the driving voltage node and connected in parallel with the first non-variable resistor;
a first variable resistor whose end is connected in series to the other end of the first non-variable resistor and whose other end is grounded;
a second variable resistor, one end of which is connected in series to the other end of the second non-variable resistor, and the other end of which is grounded;
a first measurement voltage node located at a contact point between the other end of the first non-variable resistor and one end of the first variable resistor and connected to the (-) input terminal of the amplifier; and
NFC communication, characterized in that it includes a second measurement voltage node located at the contact point of the other end of the second non-variable resistor and one end of the second variable resistor, and connected to the (+) input terminal of the amplifier. Based passive type user-perceived temperature measurement tag.
According to clause 3,
Each of the first variable resistor and the second variable resistor is a first thermistor,
The external reader or a management server capable of communicating with the external reader determines the first temperature value and the second thermistor in the space where the first thermistor is placed based on each of the first sensing voltage value and the second sensing voltage value. NFC communication-based passive type user-perceived temperature measurement tag characterized by calculating the second temperature value in the deployed space.