KR20220168934A - Passive type multi-channel sensory tag which can measure sensing values in multiple channels at low cost without loss of sensitivity in low-power environment and smart fresh logistics box including the same - Google Patents

Abstract

According to embodiments of the present invention, provided is a passive multi-channel sensor tag, which includes: a sensor portion driven by power received from an external reader to measure two or more sensing values; a sensor chip electrically connected to the sensor portion to receive the two or more sensing values; and an antenna portion receiving power and signals from the external reader and transmitting the two or more sensing values to the external reader.

Description

Passive multi-channel sensor tag capable of measuring sensing values in multiple channels at a low cost without loss of sensitivity in a low-power environment and a smart fresh logistics box including the same WITHOUT LOSS OF SENSITIVITY IN LOW-POWER ENVIRONMENT AND SMART FRESH LOGISTICS BOX INCLUDING THE SAME}

The present invention relates to a passive multi-channel sensor tag and a smart fresh distribution box including the same, and more particularly, to a passive multi-channel sensor tag capable of measuring sensing values in multiple channels at a low cost without loss of sensitivity in a low-power environment and including the same It is about a smart fresh logistics box that does.

Conventional sensor tags have measured only a single sensing value due to product characteristics that must be operated in a low-power environment.

In order to measure a plurality of sensing values through multi-channel, as in Patent Document 1 (RFID tag for ubiquitous sensor network system), an active type of tag driven by its own power source (built-in battery, etc.) implements multi-channel it is common

On the other hand, various prior documents such as Patent Document 2 (high-frequency identification tag device having a sensor input) and Patent Document 3 (wireless IC tag, concrete structure quality management system using the wireless IC tag) are passive type multi-channel sensor tags. However, these documents simply disclose that a plurality of sensors are connected to a single sensor tag chip, and power consumption increases due to multi-channel configuration, and thus reliability of sensing values decreases, tagging distance (sensing distance) decreases, etc. It has been insufficient to solve various problems of

Accordingly, there is a need to develop a passive multi-channel sensor tag capable of measuring sensing values in multiple channels at a low cost without loss of sensitivity in a low-power environment.

Korean Utility Model Publication No. 20-2008-0001962 (2008.06.19) Korean Patent Publication No. 10-2001-0043962 (May 25, 2001) Japanese Unexamined Patent Publication No. 2011-022982 (2011.02.03)

The present invention has been made to solve the above-mentioned problems, and an object of the present invention is a passive multi-channel sensor tag capable of measuring sensing values in multiple channels at a low cost without loss of sensitivity in a low-power environment and a smart fresh logistics box including the same is providing

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

According to an embodiment of the present invention in order to solve this problem, the sensor unit is driven by the power received from the external reader to measure two or more sensing values; a sensor chip electrically connected to the sensor unit to receive the two or more sensing values; and an antenna unit receiving power and signals from the external reader and transmitting the two or more sensing values to the external reader.

The sensor unit includes a first sensor and a second sensor disposed at a location physically separated from the first sensor, and the passive multi-channel sensor tag has a folding area located between the first sensor and the second sensor. It is characterized in that it is folded on the basis.

The first sensor and the second sensor are disposed to face the same direction when the passive multi-channel sensor tag is unfolded, and to face opposite directions when the passive multi-channel sensor tag is folded.

The sensor unit further includes a third sensor disposed to be spaced apart from the first sensor and the second sensor between the first sensor and the second sensor, and the folding area is between the first sensor and the third sensor. It is characterized by being located in.

The first sensor faces the same direction as the second sensor and the third sensor when the passive multi-channel sensor tag is unfolded, and faces the same direction as the second sensor and the third sensor when the passive multi-channel sensor tag is folded. It is characterized in that it is arranged to face the direction.

The substrate on which the sensor chip and the antenna unit are disposed is characterized in that at least a part of the substrate is made of a flexible printed circuit board (FPCB).

The substrate includes a first substrate area where the antenna unit is disposed and a second substrate area extending from the first substrate area, and the first sensor includes the second sensor and the third sensor in the first substrate area. At least one of them is characterized in that disposed in the second substrate area.

The sensor chip includes an operational amplifier (OP-AMP) and an analog-digital converter (ADC) input port, and the circuit unit disposed on the substrate includes a driving voltage node; a first non-variable resistor having one end connected to the driving voltage node; and a second non-variable resistor having one end connected to the driving voltage node and connected in parallel with the first non-variable resistor, wherein the sensor unit has one end in series with the other end of the first non-variable resistor. a first variable resistor connected to the other end of which is grounded; and a second variable resistor having one end connected in series to the other end of the second non-variable resistor and the other end being grounded, wherein the antenna unit connects the other end of the first non-variable resistor to the first variable resistor. a first sensing voltage value measured at a first measurement voltage node located at one of the contact points but connected to the (-) input terminal of the OP-AMP; and a second sensing voltage value measured at a second measurement voltage node located at a contact point between 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 OP-AMP. characterized in that ; is transmitted to the external reader.

The circuit unit further includes a third non-variable resistor having one end connected to the driving voltage node and connected in parallel with the first non-variable resistor and the second non-variable resistor, and the sensor unit having one end connected to the third non-variable resistor. A third variable resistor connected in series to the other end of the non-variable resistor and the other end being grounded, wherein the antenna unit is positioned at a contact point between the other end of the third non-variable resistor and one end of the third variable resistor, and the ADC It is characterized in that the third sensing voltage value measured at the third measurement voltage node connected to the input port is further transmitted to the external reader.

In addition, according to some other embodiments of the present invention, a sensor unit including two or more sensors disposed at mutually spaced apart positions that are driven by power received from an external reader to measure two or more sensing values; a sensor chip electrically connected to the sensor unit to receive the two or more sensing values; and an antenna unit that receives power and signals from the external reader and transmits the two or more sensed values to the external reader, wherein at least one sensor of the two or more sensors is wired from a substrate to transmit the sensed values to the external reader. A passive multi-channel sensor tag branching out to an external area is provided.

In addition, according to an embodiment of the present invention, a fresh logistics box equipped with a passive multi-channel sensor tag, comprising: an insulation box having an accommodation space therein; a passive multi-channel sensor tag provided on one side of the insulation box; Endothelial covering the inner space of the insulation box; and an outer shell covering the outer surface of the insulation box, wherein the passive multi-channel sensor tag is driven by power received from an external reader tagged to one side of the outer shell to measure two or more sensing values. A fresh distribution box including a sensor unit and an antenna unit receiving power and signals from the external reader and transmitting the two or more sensed values to the external reader is provided.

The passive multi-channel sensor tag measures the external temperature of the fresh distribution box between a first sensor for measuring the internal temperature of the fresh distribution box between the inner shell and the inner surface of the insulation box and the outer shell and the outer surface of the insulation box. It is characterized in that it includes a second sensor for measuring.

According to the smart fresh logistics box including the passive multi-channel sensor tag of the present invention, the inside and outside environment of the box (temperature condition) without opening the box in a series of cold chain processes in which foods, medicines, etc. etc.) can be systematically monitored.

Furthermore, according to the passive multi-channel sensor tag of the present invention, sufficiently precise measurement of sensing values for individual multi-channels is possible even in a passive sensor tag environment (that is, a low-power environment) without a separate power supply unit.

In addition, according to the passive multi-channel sensor tag of the present invention, by unifying the MCU used in the conventional single-channel sensor tag and the MCU of the multi-channel sensor tag according to the embodiments of the present invention, the single-channel / multi-channel sensor tags Development and production management costs can be drastically reduced.

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

1 is a diagram conceptually showing the configuration of a sensor tag according to some embodiments of the present invention.
2 is a diagram conceptually showing a circuit configuration of a sensor tag according to some embodiments of the present invention.
3 is a diagram conceptually showing the configuration of a sensor tag according to some other embodiments of the present invention.
4 is an exploded perspective view for explaining a smart fresh distribution box employing a sensor tag according to some embodiments of the present invention.
5 is a conceptual diagram for explaining a smart fresh distribution box employing a sensor tag according to some embodiments of the present invention.
6 is a cross-sectional view for explaining a smart fresh distribution box employing a sensor tag according to some embodiments of the present invention.
7 is a cross-sectional view for explaining a smart fresh distribution box employing a sensor tag according to some other embodiments of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Advantages and features of the present invention, and methods of achieving them, will become clear with reference to the detailed description of the following embodiments taken in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below and may be implemented in various different forms, only the present embodiments make the disclosure of the present invention complete, and common knowledge in the art to which the present invention belongs. It is provided to completely inform the person who has the scope of the invention, and the present invention is only defined by the scope of the claims. Like reference numbers designate like elements throughout the specification.

Unless otherwise defined, all terms (including technical and scientific terms) used in this specification may be used in a meaning commonly understood by those of ordinary skill in the art to which the present invention belongs. In addition, terms defined in commonly used dictionaries are not interpreted ideally or excessively unless explicitly specifically defined.

Also, in this specification, the singular form may also include the plural form unless otherwise specified in the phrase. As used herein, "comprises" and/or "comprising" means that a stated component, step, operation, and/or element is present in the presence of one or more other components, steps, operations, and/or elements. or do not rule out additions.

The sensor tag of the present invention is a passive type sensor tag not equipped with its own power source (for example, a battery), and a single sensor tag can perform a role of sensing and transmitting two or more sensed values to a reader. For example, the sensor tag may be implemented to include a plurality of temperature sensors for respectively measuring the temperatures of two or more different spaces.

1 is a diagram conceptually showing the configuration of a sensor tag according to some embodiments of the present invention.

Referring to FIG. 1, a passive multi-channel sensor tag 1000 includes a substrate 1100, a sensor unit 1200 disposed on the substrate to measure two or more sensing values, and electrically connected to the sensor unit to detect two or more sensing values. A sensor chip 1500 for receiving values, an antenna unit 1300 for receiving power and signals from an external reader (not shown) and transmitting two or more sensed values of the sensor unit to an external reader, the sensor unit on the board, A circuit unit 1400 for electrically connecting and controlling the sensor chip and the antenna unit may be included.

The substrate 1100 is preferably a flexible printed circuit board (FPCB) so that the sensor tag 1000 is folded as will be described later and mounted in a fresh distribution box. For example, the substrate 1100 may be a flexible FPCB including polyimide (PI), polyethylene terephthalate (PET), glass epoxy (GE), and the like, and the FPCB may be as shown in the present invention. It is not limited and may be a substrate formed with various layer structures made of various materials such as FCCL (Flexible Copper Clad Laminate), COVERLAY, PREPREG, and KAPTON.

Meanwhile, in the present specification, a case in which the substrate 1100 is a flexible PCB is described as an example, but at least a portion of the substrate may be a hard PCB. For example, a region of the substrate 1100 where the antenna unit 1300 is located (first substrate region 1101) is a hard PCB, and a second substrate region 1102 extending from the first substrate region 1101 is It can also be a flexible PCB.

The antenna unit 1300 and/or the circuit unit 1400 may be a conductive thin film such as aluminum or copper patterned on the substrate 1100 by pressing, plating, corrosion, or the like. Furthermore, extension lines 1601, 1602, and 1603 extending from the circuit unit 1400 to each of the sensors 1201, 1202, and 1203, which will be described later, are also conductive formed together with the antenna unit 1300 and/or the circuit unit 1400. It may be a thin film.

The sensor unit 1200 may perform, for example, a temperature sensing role, but is not limited thereto. The sensor unit 1200 is driven by power supplied from an external reader (not shown) such as a smart phone through the antenna unit 1300, and may transmit a measured result to the reader through the antenna unit 1300.

The sensor unit 1200 may include two or more sensors physically spaced apart from each other. For example, the sensor unit 1200 may include first to third sensors 1201, 1202, and 1203 spaced apart from each other as shown, but in some cases, the first to third sensors 1201, 1202, 1203) may be omitted.

In some embodiments, the first sensor 1201 may measure the external temperature of the fresh distribution box, and the second and third sensors 1202 and 1203 may measure the internal temperature of the fresh distribution box. , but not limited thereto.

On the other hand, the sensor tag 1000 is between the first sensor 1201 and the second sensor 1202, more specifically, as shown in FIGS. 4 to 6, the first sensor 1201 and the third sensor 1203 It may be folded based on the folding area FA located therebetween. As illustrated, the fold area FA may be located in the second substrate area 1102 where the second and third sensors 1202 and 1203 are disposed.

The antenna unit 1300 may include an antenna coil unit that generates induced electromotive force by collecting energy transmitted from a reader such as a smartphone, and the antenna coil unit includes one or more capacitors for frequency matching required for wireless power transmission and communication. may also be included.

The antenna unit 1300 transfers power supplied from a reader such as a smartphone through short-range wireless communication to the sensor unit 1200 when there is a request for temperature measurement from a reader such as a smartphone, and the sensor unit 1200 Sensed values such as the measured temperature may be transmitted to a reader such as a smart phone through short-range wireless communication. The short-distance wireless communication is implemented in various ways such as radio frequency identification (RFID), near field communication (NFC), Bluetooth, WiFi, Zig Bee, beacon, and LoRa (long range). Of course, the RFID may include concepts such as low-frequency identification (LFID), high-frequency identification (HFID), and ultrahigh-frequency identification (UHFID).

Meanwhile, both the sensor unit 1200 and the antenna unit 1300 may be disposed on the front surface of the substrate. That is, the first to third sensors 1201, 1202, and 1203 and the antenna unit 1300 may all be disposed on the same surface of the substrate and face the same direction. Accordingly, the first to third sensors 1201, 1202, and 1203 and the antenna unit 1300 face the same direction when the sensor tag 1000 is unfolded (ie, the state shown in FIG. 1), When the sensor tag 1000 is folded (that is, the state shown in FIGS. 4 to 6 ), the first sensor 1201 faces the second sensor 1202 and the third sensor 1203 in the opposite direction. can be placed.

On the other hand, the substrate 1100 covers at least a portion of at least one surface of the front surface of the substrate on which the first to third sensors 1201, 1202, and 1203 and the antenna unit 1300 are formed and the rear surface opposite to the front surface. A protective layer (not shown) may be formed. The protective layer is formed of, for example, a flexible material such as polyimide (PI) to protect the circuit unit 120, the sensor unit 1200, and the antenna unit 1300 on the substrate 1100 from external physical shock or moisture. can protect

2 is a diagram schematically illustrating a sensor tag according to some embodiments of the present invention from a circuit point of view.

Each of the sensor tag 1, the sensing circuit unit 10, the MCU 20, and the antenna unit 30 shown in FIG. 2 includes the sensor tag 1000, the sensor unit 1200, and the sensor chip ( 1500) and the antenna unit 1300 may be concepts substantially corresponding to each other.

In addition, the internal configuration of the sensor tag 1 shown in FIG. 2 is conceptually shown for convenience of explanation, and is not limited thereto. In addition, it goes without saying that the sensor tag 1 may include other additional components (excluding the battery) other than the sensing circuit unit 10, the MCU 20, and the antenna unit 30. Furthermore, the sensing circuit, the MCU, and the antenna blocks are not limited to those shown in which shapes and arrangements are simplified and shown.

As shown in FIG. 2, the sensor tag 1 includes a sensing circuit unit 10 that measures two or more sensed values, an MCU (20, Micro Controller Unit) that receives two or more sensed values, and an external reader that transmits two or more sensed values. It may be configured to include an antenna unit 30 for transmitting to.

The MCU 20 is an MCU having an interface for short-range wireless communication such as RFID or NFC, and the MCU 20 includes at least one OP-AMP (210, Operational amplifier) and at least one ADC (Analog-Digital Converter) input. It is an MCU that includes a port 220.

The sensing circuit unit 10 includes at least two or more non-variable/variable resistor sets connected in series from the driving voltage node Vdd to the ground terminal.

Specifically, the sensing circuit unit includes a first non-variable resistor R1 having one end connected to the driving voltage node Vdd and one end connected to the driving voltage node vdd as shown in FIG. 2 . A second non-variable resistor (R2) connected in parallel with (R1), one end of which is connected to the driving voltage node (Vdd) and connected in parallel with the first non-variable resistor (R1) and the second non-variable resistor (R2) A third non-variable resistor (R3), 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 (Th1), one end of which is the second non-variable resistor (R2) ), a second variable resistor Th2 connected in series to the other end and the other end grounded, a third variable resistor Th3, one end connected in series to the other end of the third non-variable resistor R3 and the other end grounded, A first measurement voltage node (located at the contact point of the other end of the non-variable resistor R1 and one end of the first variable resistor Th1 but connected to the (-) input terminal of the amplifier (ie, OP-AMP 210) V ^- _in ), the second measurement voltage located at the contact point of the other end of the second non-variable resistor (R2) and one end of the second variable resistor (Th2) but connected to the (+) input terminal of the OP-AMP (210) Node (V ⁺ _in ), a third measurement voltage node (V ^ADC ) located at the contact point of the other end of the third non-variable resistor R3 and one end of the third variable resistor Th3 but connected to the ADC input port 220 _in ) can be included.

Each of the first to third sensors 1201 , 1202 , and 1203 shown in FIG. 1 may have a concept corresponding to each of the first to third variable resistors Th1 , Th2 , and Th3 .

In some embodiments, each of the first to third variable resistors Th1, Th2, and Th3 may be a thermistor whose resistance characteristics change according to temperature. For example, each of the first to third variable resistors Th1, Th2, and Th3 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 sensor tag 1 is measured at each of the first measurement voltage node (V ^- _in ), the second measurement voltage node (V ⁺ _in ), and the third measurement voltage node (V ^ADC _in ). The measured voltage values (more precisely, the voltage values digitized in the MCU after measurement) can be transmitted to an external reader, and the external reader or a management server (not shown) capable of communicating with the external reader has a preset voltage-temperature conversion table. Based on the first sensing voltage value, the second sensing voltage value, and the third sensing voltage value, respectively, the first temperature value and the second thermistor in the space where the first thermistor is disposed (for example, the space outside the logistics box) To calculate the second temperature value in the space where the distribution box is located (for example, the upper space inside the distribution box) and the third temperature value in the space where the third thermistor is located (eg, the lower space inside the distribution box). do.

Meanwhile, a series of processes in which the sensor tag of the present invention receives power from an external reader, measures a sensed value, and transmits the measured value to an external reader is an OP-AMP provided in the MCU 20 of the multi-channel sensor tag ( 210) is performed in a turned-off state. Here, that the OP-AMP 210 is turned off may mean that power supply to the OP-AMP or power consumption by the OP-AMP is not substantially made, and the OP-AMP is the input value (V ^- It may also mean that an operation amplification function based on _in , V ⁺ _in ) (eg, V _out =A*(V ⁺ _in -V ^- _in ), etc.) is not performed.

In order to secure sufficient measurement voltage/conversion temperature resolution in the turn-off state of the OP-AMP and at the same time perform sufficient operation with only the wirelessly transmitted power without self-power, the sensor tag MCU of the present invention transmits each sensed analog value for each channel. It is preferable to use an MCU capable of digital conversion with a resolution of 8bit to 50bit, and in this case, even _in a low power environment, sufficiently precise temperature measurement is possible without using the OP-AMP's V ⁺ _in , V ^-in difference value amplification method.

The reason why the OP-AMP 210 is turned off is because the amplifier inside the OP-AMP consumes a lot of power, so the voltage values themselves are transmitted through wireless communication such as NFC (via a reader such as a smartphone) without operation amplification. and transmits it to the server (transferred voltage values are converted into temperature values by table matching in the server as described above).

In addition, even though OP-AMP amplification is unnecessary, the reason why MCUs with OP-AMPs are adopted is that the need for development/production management for a separate MCU for implementing multi-channel tags can be eliminated.

That is, by unifying the MCU used in the conventional single-channel sensor tag and the MCU of the multi-channel sensor tag in the present invention, development and production management costs for single-channel/multi-channel sensor tags can be drastically reduced.

Accordingly, the present invention measures and transmits sensing values for each channel having a high resolution of 8 bits to 50 bits through low power of 1 mW to 37 mW received at a sufficient tagging distance of 5 mm to 30 mm, thereby realizing a passive multi-channel sensor tag with low power and high reliability. there will be

3 is a diagram conceptually showing the configuration of a sensor tag according to some other embodiments of the present invention.

Referring to FIG. 3 , a sensor tag 1000' in which the second and third sensors 1202 and 1203 are branched by being wired to an external area of the board 1100', unlike the description with reference to FIG. 1, is shown.

That is, in order to separate the sensors 1201, 1202, and 1203 from each other, the substrate 1100 may have a structure in which the substrate 1100 is extended as shown in FIG. 1, or only some sensors may be wired without the substrate 1100' extending as shown in FIG. 2. can

4 is an exploded perspective view for explaining a smart fresh logistics box in which a sensor tag according to some embodiments of the present invention is employed, and FIG. 5 is a smart fresh logistics box in which a sensor tag is employed in accordance with some embodiments of the present invention. , and FIG. 6 is a cross-sectional view illustrating a smart fresh distribution box employing a sensor tag according to some embodiments of the present invention.

4 to 6, the fresh distribution box 2000 includes an insulation box 2200 having an accommodation space therein and having the sensor tag 1000 described above on one side thereof, and a box covering the inner space of the insulation box. It may include an inner shell 2300 and an outer shell 2100 covering the outer surface of the insulation box.

The sensor tag is driven by power received from an external reader tagged to one side of the outer shell 2100, and the first sensor 1201 is placed between the outer shell 2100 and the outer surface of the insulation box 2200. (2000), the second sensor 1202 measures the inner lower temperature of the fresh distribution box 2000 between the inner skin 2300 and the inner surface of the insulation box 2200, and the third sensor 1203 measures the inner skin ( 2300) and the inner surface of the insulation box 2200 to measure the inner upper temperature of the fresh distribution box 2000.

Preferably, the outer shell 2100 and the inner shell 2300 may be formed of a material that is thinner than the single box 2200, has high thermal conductivity, and has high flexibility. More preferably, the shell 2100 is preferably made of a material through which electromagnetic fields can pass without interference in order to prevent tagging sensitivity loss or distance loss.

7 is a cross-sectional view for explaining a smart fresh distribution box employing a sensor tag according to some other embodiments of the present invention.

Referring to FIG. 7 , the first sensor 1201 measures the external temperature of the fresh distribution box 2000 between the outer shell 2100 and the outer surface of the insulation box 2200, and the second sensor 1202 measures the temperature of the inner shell 2300. The third sensor 1203 measures the temperature on the surface or inside of the article or small packaging container G accommodated in the inner space, and the internal temperature of the fresh distribution box 2000 between the inner skin 2300 and the inner surface of the insulation box 2200. can play a role in measuring

To this end, a through hole 2310 through which a part of the sensor tag body can be inserted from the outside of the endothelium 2300 to the inside of the endothelium 2300 may be provided in one region of the endothelium 2300 .

Alternatively, for this purpose, the fresh distribution box 2000 may be configured such that the endothelium 2300 is omitted, unlike that shown.

Those skilled in the art related to the present embodiment will be able to understand that it may be implemented in a modified form within a range that does not deviate from the essential characteristics of the above description. Therefore, the disclosed methods are to be considered in an illustrative rather than a limiting sense. The scope of the present invention is shown in the claims rather than the foregoing description, and all differences within the equivalent scope will be construed as being included in the present invention.

Claims (12)

As a passive multi-channel sensor tag,
A sensor unit driven by power received from an external reader to measure two or more sensed values;
a sensor chip electrically connected to the sensor unit to receive the two or more sensing values; and
A passive multi-channel sensor tag including an antenna unit for receiving power and signals from the external reader and transmitting the two or more sensing values to the external reader.
According to claim 1,
The sensor unit includes a first sensor and a second sensor disposed at a location physically separated from the first sensor,
The passive multi-channel sensor tag is characterized in that the passive multi-channel sensor tag is folded based on a folding area located between the first sensor and the second sensor.
According to claim 2,
The first sensor and the second sensor are disposed to face the same direction when the passive multi-channel sensor tag is unfolded and to face opposite directions when the passive multi-channel sensor tag is folded. sensor tag.
According to claim 3,
The sensor unit further includes a third sensor disposed between the first sensor and the second sensor to be spaced apart from the first sensor and the second sensor,
The folded area is characterized in that located between the first sensor and the third sensor, passive multi-channel sensor tag.
According to claim 4,
The first sensor faces the same direction as the second sensor and the third sensor when the passive multi-channel sensor tag is unfolded, and faces the same direction as the second sensor and the third sensor when the passive multi-channel sensor tag is folded. Characterized in that it is arranged facing the direction, passive multi-channel sensor tag.
According to claim 1,
A passive multi-channel sensor tag, characterized in that at least a part of the substrate on which the sensor chip and the antenna unit are disposed is made of a flexible printed circuit board (FPCB).
According to claim 6,
The substrate includes a first substrate area where the antenna unit is disposed and a second substrate area extending from the first substrate area,
The first sensor is disposed in the first substrate area, and at least one of the second sensor and the third sensor is disposed in the second substrate area.
According to claim 6,
The sensor chip includes an operational amplifier (OP-AMP) and an analog-digital converter (ADC) input port,
The circuit part disposed on the substrate,
driving voltage node;
a first non-variable resistor having one end connected to the driving voltage node; and
A second non-variable resistor having one end connected to the driving voltage node and connected in parallel with the first non-variable resistor;
The sensor unit,
a first variable resistor having one end connected in series to the other end of the first non-variable resistor and the other end being grounded; and
A second variable resistor having one end connected in series to the other end of the second non-variable resistor and the other end being grounded;
The antenna part,
a first sensing voltage value measured at 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 OP-AMP; and
a second sensing voltage value measured at a second measurement voltage node located at a contact point between 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 OP-AMP; Passive multi-channel sensor tag, characterized in that for transmitting to the external reader.
According to claim 8,
The circuit unit further includes a third non-variable resistor having one end connected to the driving voltage node and connected in parallel with the first non-variable resistor and the second non-variable resistor,
The sensor unit further includes a third variable resistor having one end connected in series to the other end of the third non-variable resistor and the other end being grounded,
The antenna unit is located at a contact point between the other end of the third non-variable resistor and one end of the third variable resistor, and transmits a third sensing voltage value measured at a third measurement voltage node connected to the ADC input port to the external reader. Characterized in that it further transmits, a passive multi-channel sensor tag.
As a passive multi-channel sensor tag,
A sensor unit including two or more sensors disposed at mutually spaced apart positions that are driven by power received from an external reader and measure two or more sensing values;
a sensor chip electrically connected to the sensor unit to receive the two or more sensing values; and
An antenna unit for receiving power and signals from the external reader and transmitting the two or more sensed values to the external reader;
At least one sensor of the two or more sensors is wired from the substrate and branched to an external area of the substrate, a passive multi-channel sensor tag.
As a fresh distribution box equipped with a passive multi-channel sensor tag,
Insulation box equipped with a receiving space inside;
a passive multi-channel sensor tag provided on one side of the insulation box;
Endothelial covering the inner space of the insulation box; and
Including; an outer shell covering the outer surface of the insulation box,
The passive multi-channel sensor tag,
A sensor unit that is driven by power received from an external reader tagged with one side of the outer shell and measures two or more sensed values; receives power and signals from the external reader and transmits the two or more sensed values to the external reader. Characterized in that it comprises an antenna unit for transmitting to the reader, fresh logistics box.
According to claim 11,
The passive multi-channel sensor tag measures the external temperature of the fresh distribution box between a first sensor for measuring the internal temperature of the fresh distribution box between the inner shell and the inner surface of the insulation box and the outer shell and the outer surface of the insulation box. Characterized in that it comprises a second sensor for measuring, fresh logistics box.

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