CN209712910U - Articles with wireless communication tags and metal bodies with wireless communication tags - Google Patents

Abstract

The utility model relates to a kind of article and wireless communication tag with wireless communication tag.The built-in RFIC chip with 2 input and output terminals in RFIC encapsulation (12).One end of exciting conductor (14) and an input and output terminal of RFIC chip connect.The electrical length of the other end (=open end) from the input and output terminal to exciting conductor (14) is adjusted to 1/4 λ.Connection is connected with the one end of conductor (16) and another input and output terminal of RFIC chip, and the other end of connection conductor 16 is open.The one end for constituting the main shaft of High-pressure air valve is connected with the open end for using conductor (16) is connect.

Description

Articles with wireless communication tags and metal bodies with wireless communication tags

The application of this utility model is the international application number PCT/JP2015/050683, the international application date is 2015/1/13, the application number entering the Chinese national phase is 201590000247.1, and the title is “articles with wireless communication labels and wireless communication labels”. Divisional application of patent application.

technical field

The utility model relates to a wireless communication tag including an integrated circuit for wireless communication with two input and output terminals, two conductors respectively connected to the two input and output terminals, and an article with the wireless communication tag.

Background technique

An example of such a background technology is disclosed in Patent Document 1. According to this background art, the wireless IC chip is coupled to the first radiating element and the second radiating element that function as a dipole antenna. Here, the wireless IC chip and the first radiation element are provided on a small-sized power supply board, and the second radiation element is provided on a large-size printed wiring board different from the power supply board. That is, the second radiating element is provided separately from the main body portion of the wireless communication device. Thereby, the size of the second radiating element can be increased, and the size of the main body portion of the wireless communication device can be reduced.

prior art literature

Patent Literature

Patent Document 1: International Patent Publication No. 2012/093541

Utility model content

The technical problem to be solved by the utility model

However, since the second radiating element is an element exclusively used for a dipole-type antenna, there is a problem that the cost increases.

Therefore, the main purpose of the present invention is to provide an article with a wireless communication tag or a wireless communication tag that can improve high-frequency transmission characteristics at low cost.

technical solutions to technical problems

The article with a wireless communication label of the present invention is an article with a wireless communication label, and the wireless communication label includes: an integrated circuit for wireless communication, the integrated circuit for wireless communication has a first input and output terminal and a second input and output terminal; a conductor having one end connected to the first input/output terminal and the other end open; and a connecting conductor having one end connected to the second input/output terminal and the other end open, the article is provided with a metal One end of the metal body is connected to the open other end of the connection conductor and the other end of the metal body is open.

Preferably, the electrical length from the first input/output terminal to the other end of the excitation conductor is less than 1/2 wavelength.

More preferably, the electrical length from the first input/output terminal to the other end of the excitation conductor is about 1/4 wavelength.

Preferably, the electrical length from the second input/output terminal to the open end of the metal body is equal to or more than 1/2 wavelength.

Preferably, the wireless communication tag further includes a power feeding circuit having a predetermined resonance frequency, and the excitation conductor and the connecting conductor are connected to the first input/output terminal and the second input/output terminal via the power feeding circuit, respectively.

Preferably, the excitation conductor and the connection conductor are respectively formed on the flexible base material.

Preferably, the metal body includes a columnar body, and the wireless communication tag is connected to one end surface of the columnar body.

More preferably, the columnar body is a cylindrical main axis.

The wireless communication tag of the present invention comprises: an integrated circuit for wireless communication, the integrated circuit for wireless communication has a first input and output terminal and a second input and output terminal; an excitation conductor, the excitation conductor has a connection with the first input and output terminal one end and the other open end; and a connection conductor, the connection conductor has one end connected to the second input/output terminal and an open other end, the open other end of the connection conductor is connected with one end of the metal body, the metal The body forms at least a portion of the article and the other end of the metal body is open.

Utility model effect

The second input/output terminal is connected to a connection conductor having a predetermined area, and the other end of the excitation conductor connected to the first input/output terminal is an open end, so the excitation conductor functions as a monopole antenna. When the current corresponding to the high-frequency signal flows through the excitation conductor, the same current flows through the connection conductor due to the mirror effect. Here, since the metal body is connected to the connecting conductor, current also flows through the metal body. That is, the current flowing through the connection conductor and the metal body flows through the metal body so that the connection conductor and the metal body just form a dipole antenna element, and a corresponding high-frequency signal is radiated from the metal body.

By making the metal body function as a dipole-type antenna, the high-frequency transmission characteristics can be improved. In addition, by using the metal body constituting the article for wireless communication, it is possible to suppress the cost of improving the high-frequency transmission characteristics.

The above-mentioned object, other objects, features, and advantages of the present invention will be further clarified by the detailed description of the following embodiments with reference to the accompanying drawings.

Description of drawings

FIG. 1 is a perspective view showing an example of a state in which the RFID tag of this embodiment is viewed obliquely from above.

FIG. 2(A) is a side view showing an example of a state in which the RFID tag shown in FIG. 1 is viewed from the side, and FIG. 2(B) is a side view showing the RFID tag shown in FIG. 1 (excluding the flexible base material) viewed from below A bottom view of an example of a state other than .

FIG. 3 is a schematic diagram showing one example of the structure of an RFIC package suitable for the RFID tag shown in FIG. 1 .

FIG. 4 is a circuit diagram showing an example of the configuration of a power supply circuit provided in the RFIC package shown in FIG. 3 .

FIG. 5 is a schematic diagram showing an example of a state in which the RFID tag shown in FIG. 1 is mounted on the valve.

FIG. 6 is an enlarged view showing the vicinity of the RFID tag mounted on the valve.

7(A) is a schematic diagram showing an example of the operation when the excitation conductor constituting the RFID tag constitutes a monopole antenna, and FIG. 7(B) is a diagram showing the flow of the excitation conductor constituting the RFID tag and the high pressure gas FIG. 7(C) is a schematic diagram showing an example of the operation when the main shaft constituting the high-pressure gas valve constitutes a dipole antenna.

FIG. 8 is a schematic diagram showing an example of the appearance of the measuring device to which the RFID tag shown in FIG. 1 is attached.

9 is a schematic diagram showing an example of a connection state between a switch provided on the front surface of the measuring device and a variable resistance element provided on a printed circuit board inside the measuring device.

FIG. 10 is a schematic diagram showing an example of a state in which the RFID tag shown in FIG. 1 is attached to a switch.

FIG. 11 is an enlarged view showing the vicinity of the RFID tag attached to the switch.

Detailed ways

Typically, the wireless communication tag of the present invention is an RFID (RadioFrequency IDentification: radio frequency identification) tag using the UHF frequency band as a communication frequency.

1 , FIG. 2(A) and FIG. 2(B) , the RFID tag 10 of this embodiment includes a cuboid RFIC (RadioFrequency Integration Circuit) package 12 . The RFIC package 12 includes an RFIC chip (radio communication integrated circuit chip) 12e for processing RFID signals, and a power supply circuit board 12c on which the RFIC chip is mounted. In this embodiment, the X axis, the Y axis, and the Z axis are assigned to the longitudinal direction, the width direction, and the thickness direction of the rectangular parallelepiped constituting the RFIC package 12 . In addition, on the lower surface (=surface facing the negative side in the Z-axis direction) of the RFIC package 12, two I/O terminals 12a and 12b arranged along the X-axis are provided. The I/O terminals 12a and 12b of the RFIC package 12 are connected to the first input/output terminal 12h and the second input/output terminal 12i of the RFIC chip 12e via a power supply circuit provided on the power supply circuit board 12c, respectively.

The flexible substrates 18 and 20 are made of resin films, and their main surfaces are formed in a rectangular shape. The excitation conductor 14 is printed on the main surface of the flexible base material 18 , and the connection conductor 16 is printed on the main surface of the flexible base material 20 . In addition, the excitation conductor 14 and the connection conductor 16 may be formed on the same flexible base material.

However, the width of the rectangle constituting the main surface of the flexible substrate 18 significantly exceeds the width of the RFIC package 12 , whereas the width of the rectangle constituting the main surface of the flexible substrate 20 slightly exceeds the width of the RFIC package 12 . In addition, the excitation conductor 14 is formed in a strip shape, whereas the connection conductor 16 is formed so as to cover the entire main surface of the flexible base material 20 .

One end of the excitation conductor 14 is connected to the I/O terminal 12 a via the conductive bonding material 22 , and the other end of the excitation conductor 14 is an open end. Therefore, the flexible base material 18 extends more toward the positive side in the X-axis direction than the RFIC package 12 . In addition, on the main surface of the flexible base material 18, the excitation conductor 14 is constituted by a meander-like conductor pattern, which meanders toward the negative side in the Y-axis direction with one end as a starting point, and protrudes on the positive side in the X-axis direction. Bend on the positive side of the Y-axis, then extend in a straight line to the other end.

On the other hand, one end of the rectangle formed by the connection conductor 16 is connected to the I/O terminal 12b via the conductive bonding material 24, and the other end of the rectangle formed by the connection conductor 16 is an open end. Therefore, the flexible base material 20 extends more toward the negative side in the X-axis direction than the RFIC package 12 .

Referring to FIG. 3 , the RFIC package 12 includes a power supply circuit substrate 12c and a sealing layer 12d each formed in a plate shape. The sealing layer 12d is laminated on the feeder circuit board 12c, and the side surface of the sealing layer 12d (=surfaces orthogonal to the X axis and the Y axis, respectively) and the side surface of the feeder circuit board 12c are flush with each other.

The above-mentioned I/O terminals 12a and 12b are formed on the lower surface of the power supply circuit board 12c. In addition, the I/O terminals 12f and 12g are formed on the upper surface of the power supply circuit board 12c. The RFIC chip 12e is embedded in the sealing layer 12d, and the bump-shaped first input/output terminal 12h and the second input/output terminal 12i are formed on the lower surface of the RFIC chip 12e. The first input/output terminal 12h is connected to the I/O terminal 12f, and the second input/output terminal 12i is connected to the I/O terminal 12g.

The power feeding circuit 12j shown in FIG. 4 is provided on the power feeding circuit board 12c. 4, one end of the capacitor C1 is connected to the I/O terminal 12a, the other end of the capacitor C1 is connected to the I/O terminal 12f, and further connected to the first input/output terminal 12h. In addition, one end of the capacitor C2 is connected to the I/O terminal 12b, the other end of the capacitor C2 is connected to the I/O terminal 12g, and further to the second input/output terminal 12i. One end of the inductor L1 is connected to one end of the capacitor C1, and the other end of the inductor L1 is connected to one end of the capacitor C2.

The resonance frequency of the RFID tag 10 corresponds to the carrier frequency of the high-frequency signal for wireless communication, and is determined by the inductance components of the inductor L1 and capacitors C1 to C2 and the excitation conductor 14 constituting the power supply circuit 12j. The electrical length from the first input/output terminal 12h to the open end of the excitation conductor 14 is set to 1/4 (=1/4λ) of the wavelength of the high-frequency signal having the predetermined resonance frequency. As a result, when the connection conductor 16 is connected to the ground GND (in this embodiment, the spindle 36 and the valve 38 described later), the RFIC package 12 and the excitation conductor 14 function as a monopole antenna. However, the radiator is not placed in a good environment, so it cannot radiate electromagnetic waves far away.

5 , the high-pressure gas valve 30 includes a valve box 32 that forms a valve chamber RM1 that accommodates the valve 38, and a handle 34 that adjusts the position of the valve 38 via a spindle 36. The high-pressure gas valve 30 is installed in the high-pressure gas container 40 such that the opening of the high-pressure gas container 40 seals the lower surface of the valve box 32 . The high-pressure gas container 40 is a metal container.

The handle 34 is a resin molded body and is configured as a cylinder extending in the vertical direction, and is disposed above the valve box 32 . The valve box 32 is a metal container. The handle 34 has a large opening at the upper end of the cylinder, and the lower end of the cylinder is closed except for the through hole HL1 extending in the vertical direction at the center of the circle. In other words, the handle 34 has a recessed portion CC1 recessed downward, and a through hole HL1 is formed in the center of the bottom surface of the recessed portion CC1.

An intake hole VT1 for introducing high pressure gas into the valve chamber RM1 is formed on the lower surface of the valve box 32 , and an exhaust hole VT2 for discharging the high pressure gas introduced into the valve chamber RM1 is formed on the side surface of the valve box 32 . In addition, on the upper surface of the valve box 32, a through hole HL2 is formed, and the through hole HL2 has the same inner diameter as the through hole HL1 and reaches the valve chamber RM1.

The main shaft 36 is made of metal and formed in a cylindrical shape. The outer diameter of the cylinder is substantially the same as the inner diameter of each of the through holes HL1 and HL2. The main shaft 36 extends in the up-down direction, and its upper end reaches the concave portion CC1 through the through hole HL1, while its lower end reaches the valve chamber RM1 through the through hole HL2.

The valve 38 is made of metal and formed in a disk shape. One main face of the circular plate is upward, and the other main face of the circular plate is downward. The outer diameter of the disc is larger than the outer diameter of the main shaft 36, and the lower end of the main shaft 36 reaching the valve chamber RM1 is coupled to the valve 38 at the center of one main surface of the disc. The valve 38 moves up and down according to the operation of the handle 34, thereby adjusting the discharge amount of the high-pressure gas from the exhaust hole VT2.

Further referring to FIG. 6 , the RFID tag 10 is attached to the recessed portion CC1 formed in the handle 34 so as to be upside down with respect to the recessed portion CC1 . The upper surface of the RFIC package 12 is joined to the bottom surface of the concave portion CC1 , the excitation conductor 14 is joined to the inner peripheral surface of the concave portion CC1 , and the connection conductor 16 is joined to the upper end of the spindle 36 . In particular, the connection conductor 16 is joined to the upper end of the main shaft 36 by the conductive joining material 42 .

In addition, the length of the main shaft 36 is adjusted so that the electrical length from the second input/output terminal 12i shown in FIG. 3 to the valve 38 is 1/2 (=1/2λ) or more of the wavelength of the high frequency having the above-mentioned resonance frequency .

7(A), the RFID tag 10 is mounted on the high-pressure gas valve 30 as shown in FIG. 5, the main shaft 36 and the valve 38 constitute the ground GND, and the RFIC chip 12e and the excitation conductor 14 operate in the same state as the monopole antenna. , which acts as an exciter. Therefore, when the current I corresponding to the resonance frequency of the RFIC chip 12e flows through the excitation conductor 14, the same current I also flows through the connection conductor 16 due to the mirror effect. Here, in the case where the second input/output terminal has only the connection conductor, the electrical length from the second input/output terminal to the open end of the connection conductor is less than λ/4, but there is a metal in front of the connection conductor 16 . The main shaft 36 and the valve 38 are made to be manufactured, so that the electrical length from the second input/output terminal becomes 1/2λ or more, so the main shaft 36 and the valve 38 generate a standing wave I′ of the current based on the current I (refer to FIG. 7(B)). At this time, the main shaft 36 and the valve 38 are like dipole antennas, that is, the metal parts before the second input and output terminals generate a resonance of λ/2, and as a result, the current I' flows through these metal bodies (refer to FIG. 7(C) ), and a high-frequency signal having an intensity corresponding to the magnitude of the current I′ is output from these metal bodies.

As can be seen from the above description, in the RFID tag, the RFIC chip 12e includes the first input/output terminal 12h and the second input/output terminal 12i. The excitation conductor 14 includes one end connected to the first input/output terminal 12h, and the other end whose electrical length from the first input/output terminal 12h is less than 1/2λ, particularly, is open at a position representing 1/4λ. The connection conductor 16 includes one end connected to the second input/output terminal 12i and the other end open. One end of the main shaft 36 constituting the high-pressure gas valve 30 is connected to the open end of the connection conductor 16 , and the other end of the main shaft 36 is connected to the valve 38 .

By making the main shaft 36 and the valve 38 function as a dipole antenna, the high-frequency transmission characteristics can be improved. In addition, by using the member constituting the high-pressure gas valve 30 for wireless communication as well, it is possible to suppress the cost of improving the high-frequency transmission characteristics. In addition, the valve box 32 and the high-pressure gas container 40 are made of metal, and if they are connected to the main shaft 36 and the valve 38, a part of the valve box 32 and the high-pressure gas container 40 can be used as a radiation element, and communication can be further increased. distance.

Furthermore, in this embodiment, the RFID tag 10 is attached to the high-pressure air valve 30 . However, the object to which the RFID tag is attached may be the high-pressure gas container 40, and any articles other than the high-pressure gas valve 30 may be used as long as it has a metal body, such as a metal tool such as a wrench.

As another example, assume the meter 50 shown in FIG. 8 . Referring additionally to FIG. 9 , the measuring device 50 includes a casing 52 , and the printed circuit board 62 is accommodated in the casing 52 . One main surface of the printed circuit board 62 faces upward, and the other main surface of the printed circuit board 62 faces downward. A plate-shaped ground electrode 64 is embedded in the printed circuit board 62 . The ground electrode 64 is also embedded in the printed circuit board 62 with its one main surface and the other main surface facing upward and downward, respectively. The variable resistance element 66 is mounted on the printed circuit board 62. The variable resistance element 66 is electrically connected to the ground electrode 64 embedded in the printed circuit board 62 .

A switch 54 for volume adjustment is provided on the front surface of the casing 52 . The switch 54 is formed of a knob 56 made of resin and a spindle 60 made of metal. The knob 56 is formed as a cylinder, while the main shaft is formed as a cylinder. In addition, the length of the main shaft 60 exceeds the length of the knob 56 , and the outer diameter of the main shaft 60 is smaller than the outer diameter of the knob 56 .

As shown in FIG. 10 , one end of the cylinder constituting the knob 56 is open, and the other end of the cylinder constituting the knob 56 is closed. In other words, the knob 56 is formed with a recessed portion CC2 recessed from one end to the other end. A cylindrical support body 58 having an outer diameter smaller than the inner diameter of the cylinder constituting the knob 56 and extending in the same direction as the cylinder constituting the knob 56 is provided on the bottom surface of the recess CC2.

The inner diameter of the cylinder constituting the support body 58 is substantially the same as the outer diameter of the main shaft 60 , and the main shaft 60 is inserted into the support body 58 . Specifically, one end of the main shaft 60 is an open end, and the other end of the main shaft 60 is screwed with the support body 58 . When the switch 54 is provided on the front surface of the case 52 , the main shaft 60 is perpendicular to the front surface of the case 52 , and one end of the main shaft 60 penetrates the inside of the case 52 and reaches the variable resistance element 66 . Since the spindle 60 has conductivity, the resistance value of the variable resistance element 66 is adjusted by rotating the spindle 60 in the axial direction using the knob 56 .

In addition, since the variable resistance element 66 is electrically connected to the ground electrode 64 as described above, the spindle 60 is also electrically connected to the ground electrode 64 via the variable resistance element 66 .

Further referring to FIG. 11 , the RFID tag 10 is accommodated in the recessed portion CC2 formed in the knob 56 . At this time, the flexible substrate 18 supporting the excitation conductor 14 is joined to the inner peripheral surface of the concave portion CC2 , and the connection conductor 16 is joined to the other end of the main shaft 60 . In particular, the conductor for connection 16 is joined to the other end of the main shaft 60 via the conductive joining material 68 .

In this embodiment, the main shaft 36 and the ground electrode 64 function as a dipole antenna, so that the high-frequency transmission characteristics can be improved. In addition, by using the components constituting the measuring device 50 also for wireless communication, it is possible to suppress the cost for improving the high-frequency transmission characteristics.

Label description

10…RFID tags (wireless communication tags)

12e...RFIC chip (Integrated Circuit for Wireless Communication)

12h...the first input and output terminal

12i...The second input and output terminal

12j...Power supply circuit

14...Excitation conductor

16...Conductor for connection

18, 20...Flexible substrates

30…high pressure air valve (item)

36...Spindle (metal body)

38…Valve (metal body)

50...Measuring device (item)

60…Spindle (metal body)

64...Ground electrode (metal body)

Claims (11)

1. a kind of article with wireless communication tag is attached to wireless communication tag, the spy of the article with wireless communication tag Sign is,

The wireless communication tag includes:

Wireless communication integrated circuit, the wireless communication have the first input and output terminal and the second input and output with integrated circuit Terminal；

Exciting conductor, the exciting conductor have the one end connecting with first input and output terminal and the open other end；With And

Connection conductor, connection conductor have the one end connecting with second input and output terminal and open another End,

The article has metallic object, one end of the metallic object with it is described connection conductor the opening the other end be connected and The other end is open.

2. as described in claim 1 with the article of wireless communication tag, which is characterized in that

The exciting conductor is formed in flexible parent metal.

3. as described in claim 1 with the article of wireless communication tag, which is characterized in that

The exciting conductor is made of the conductive pattern of serpentine shape.

4. the article as described in any one of claim 1 to 3 with wireless communication tag, which is characterized in that

It is 1/4 wavelength from first input and output terminal to the electrical length of the other end of the exciting conductor.

5. the article as described in any one of claim 1 to 3 with wireless communication tag, which is characterized in that

The electrical length of open end from second input and output terminal to the metallic object is 1/2 wavelength or more.

6. the article as described in any one of claim 1 to 3 with wireless communication tag, which is characterized in that

The wireless communication tag is also equipped with the power supply circuit with regulation resonance frequency,

The exciting conductor and the connection are with conductor respectively via the power supply circuit and first input and output terminal And the second input and output terminal connection.

7. the article as described in any one of claim 1 to 3 with wireless communication tag, which is characterized in that

The metallic object includes column, and the wireless communication tag is connect with an end face of the column.

8. as claimed in claim 7 with the article of wireless communication tag, which is characterized in that

The column is columned main shaft.

9. a kind of metallic object with wireless communication tag is attached to wireless communication tag, the metallic object with wireless communication tag It is characterized in that,

The wireless communication tag includes:

Wireless communication integrated circuit, the wireless communication have the first input and output terminal and the second input and output with integrated circuit Terminal；

Exciting conductor, the exciting conductor have the one end connecting with first input and output terminal and the open other end；With And

Connection conductor, the connection conductor are connect with second input and output terminal,

The metallic object is connected with the connection with conductor.

10. as claimed in claim 9 with the metallic object of wireless communication tag, which is characterized in that

The exciting conductor is formed in flexible parent metal.

11. as claimed in claim 9 with the metallic object of wireless communication tag, which is characterized in that

The exciting conductor is made of the conductive pattern of serpentine shape.