JP2004005467A - Linear radio tag body, its system, its sensor system, position detecting method, sensor value detecting method and its manufacturing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a linear radio tag body for efficiently using a microscopic radio tag. <P>SOLUTION: This linear radio tag body 11 comprises the small diameter radio tag 13 for internally storing a transmission part for transmitting an electric signal by radio transmission and a linear holder (a polymer 12) for separately holding this radio tag at a prescribed interval. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a linear wireless tag body using a minute wireless tag and a method for manufacturing the same.
[0002]
[Prior art]
2. Description of the Related Art In recent years, in various fields, a technology for collecting various kinds of information by using a large number of sesame-sized wireless tags including a wireless communication IC and an antenna has attracted attention as nanotechnology.
[0003]
When trying to obtain detailed information from a certain area using the above-described wireless tag, if the above-described wireless tag is placed in that area, the information can be collected as such. However, considering the cost of the wireless tags, it is not advisable to collect them only in a certain area because the cost increases. Also, it is not usually necessary to obtain much information from a small area, and it is generally useless.
[0004]
Therefore, in order to use such wireless tags efficiently, it is necessary to scatter them to some extent evenly, but it is usually difficult to always and almost uniformly place these wireless tags in a certain wide area. is there.
[0005]
[Problems to be solved by the invention]
SUMMARY OF THE INVENTION The present invention has been made in view of the above-described conventional problems, and has as its object to provide a wireless tag body that can use minute wireless tags efficiently.
[0006]
[Means for Solving the Problems]
In order to achieve the above object, according to claim 1 of the present invention, a small-diameter wireless tag having a built-in transmitting unit for wirelessly transmitting an electric signal, and a linear holding device for holding the wireless tag at predetermined intervals And a linear wireless tag body characterized by comprising:
[0007]
According to the second aspect of the present invention, a small-diameter wireless tag including a sensor and a transmitting unit that wirelessly transmits a value measured by the sensor as an electric signal, and a linear wireless tag that holds the wireless tag at a predetermined interval. The present invention provides a linear wireless tag body comprising a holder.
[0008]
According to claim 6 of the present invention, there is provided a system of a linear wireless tag body formed by knitting a plurality of linear holders for holding small-diameter wireless tags at predetermined intervals, wherein the wireless tag is Provides a system of a linear wireless tag body, which has a built-in transmission unit for wirelessly transmitting an electric signal.
[0009]
According to claim 7 of the present invention, there is provided a system of a linear wireless tag body formed by knitting a plurality of linear holders for holding small-diameter wireless tags at predetermined intervals, wherein the wireless tag is Provides a sensor system for a linear wireless tag body, comprising: a sensor; and a transmitting unit that wirelessly transmits a value measured by the sensor as an electric signal.
[0010]
According to the eighth aspect of the present invention, there is provided a linear wireless tag body including a small-diameter wireless tag having a built-in transmitting unit for wirelessly transmitting an electric signal and a linear holding body for holding the wireless tag at a predetermined interval. A transmission step of transmitting an electric signal from the transmission section, and a position detection step of receiving the electric signal transmitted in the transmission step and detecting a position of the wireless tag transmitting the electric signal; Provided is a position detection method using a tag body.
[0011]
According to the ninth aspect of the present invention, a small-diameter wireless tag including a sensor and a transmitter for wirelessly transmitting a value measured by the sensor as an electric signal, and a linear holding unit for holding the wireless tag at a predetermined interval. A transmitting step of transmitting an electric signal from the transmitting unit of the linear wireless tag body comprising a body, a position of the wireless tag transmitting the electric signal transmitted by the transmitting step, and transmitting the electric signal, and a radio thereof. And a sensor value detecting step of detecting a value measured by the sensor of the tag.
[0012]
According to claim 10 of the present invention, a charging step of charging a small-diameter wireless tag having a built-in transmitting unit for wirelessly transmitting an electric signal into a molten polymer, and the wireless tag inserted by the charging step A withdrawal step of withdrawing the melted polymer mixture from a nozzle, and cooling the mixture withdrawn by the withdrawal step, and disposing the wireless tag in a linear polymer with a predetermined distance between the wireless tags. And a linearizing step of obtaining a wireless tag body.
[0013]
According to the eleventh aspect of the present invention, a small-diameter wireless tag having a sensor and a detection unit for detecting a value measured by the sensor as an electric signal, and a light generating an electric signal detected by the wireless tag as an optical signal A signal generator, and a linear holder for holding the optical signal generator and the wireless tag at predetermined intervals, and transmitting an optical signal generated by the optical signal generator through the holder. A featured linear wireless tag body is provided.
[0014]
According to the fourteenth aspect of the present invention, a small-diameter wireless tag including a sensor, a transmitting unit that transmits a value measured by the sensor as an electric signal, a power supply unit that receives power supply by electromagnetic induction, A linear holder for holding the tag separated by a predetermined distance, and receiving power supplied to the power supply unit of the wireless tag and transmitting an electric signal of a value measured by the sensor from the transmission unit. A featured linear wireless tag body is provided.
[0015]
According to the eighteenth aspect of the present invention, the first electromagnetic coil, the smoothing circuit for smoothing the electromotive force induced in the electromagnetic coil, the oscillating circuit supplied with the output of the smoothing circuit and oscillating, and the output of the oscillating circuit. A small-diameter wireless tag having a second electromagnetic coil to pass therethrough, an optical signal generating unit for generating an electric signal detected by the wireless tag as an optical signal, and holding the optical signal generating unit and the wireless tag at predetermined intervals A linear holder, wherein the oscillating circuit is an oscillating circuit whose oscillating frequency changes with temperature, wherein the wireless tag receives supply of power to the first electromagnetic coil and generates the optical signal generated by the optical signal generating unit. The optical signal is transmitted through the carrier, thereby providing a linear wireless tag body.
[0016]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings. In order to arrange the small-diameter wireless tags having the sensor function almost uniformly, the wireless tags may be held on the holder at regular intervals. That is, in order to arrange the wireless tags one-dimensionally and uniformly, it is sufficient to fix the wireless tags to the linear holder at regular intervals, and to arrange the wireless tags two-dimensionally, the above-described wireless tag is used. This can be achieved by knitting a wireless tag body in which tags are held at regular intervals in a linear holder, for example, in the vertical and horizontal directions.
[0017]
The wireless tag fixed to the wireless tag body may be embedded at a predetermined interval in the linear holder, and the linear holder has a hollow structure, and a sensor function is provided in the hollow holder. The wireless tags may be inserted at predetermined intervals and then filled.
[0018]
FIG. 1 shows a structure of an embodiment of a linear wireless tag according to the present invention. The linear wireless tag body 11 includes a linear polymer 12 and a wireless tag 13 embedded in the polymer. The wireless tag 13 is, for example, a spherical element having a diameter of 1 mm or less. Although not shown, a temperature sensor, a modulator for modulating a temperature signal measured by the temperature sensor and a signal of the position, and the modulator are provided. An antenna for transmitting a temperature signal and a position signal modulated by the above is built in. The polymer 12 has thermoplasticity that is melted by overheating and solidified by cooling.
[0019]
The linear wireless tag body 11 is manufactured by, for example, a linear wireless tag manufacturing apparatus 21 as shown in FIG. This device has a pipe 22 for charging a spherical wireless tag 13 at an upper part, a tank 24 for storing a molten polymer 23, a pump 25 attached to a lower part of the tank 24, and a pump 25 drawn from the pump 25. It comprises a nozzle 26 for extracting a mixture of the molten polymer and the wireless tag 13 in a thread form, and a take-up reel 28 for cooling the mixture extracted from the nozzle and winding the mixture through rollers 27a and 27b. The linear wireless tag body 11 having the structure illustrated in FIG. 1 is manufactured by the linear wireless tag manufacturing apparatus 21 illustrated in FIG. 2, and is wound around the take-up reel 28.
[0020]
The process in which the molten polymer 23 and the wireless tag 13 are drawn out of the tank 24 by the pump 25 and then drawn out linearly from the nozzle 26 is the same as in a normal spinning process.
[0021]
The interval between the wireless tags 13 arranged in the polymer 12 shown in FIG. 1 is determined by the amount of the wireless tags to be put into the tank 24 containing the molten polymer 23 from the pipe 22, that is, the density of the wireless tags 13 in the tank 24. Is adjusted by To shorten the interval between the wireless tags 13, many wireless tags are put into the molten polymer 23. To increase the interval between the wireless tags 13, the amount of the wireless tags 13 to be thrown into the molten polymer 23 can be reduced. Just fine.
[0022]
The linear wireless tag body 11 manufactured in this manner can be used by being knitted like ordinary fibers. For example, it can be used for clothes, hats, curtains, nets, textile materials of stuffed robots, etc., and can produce healthy and safe products.
[0023]
In addition, the wireless tag 13 including the temperature sensor constantly detects and transmits the temperature to those produced by the linear wireless tag body 11, and receives signals emitted from those wireless tags. If such a receiver is provided, it is possible to detect the temperature of each part of the product manufactured using the linear wireless tag body three-dimensionally outside and without contact.
[0024]
In addition, if the linear wireless tag body 11 is used as a shell material of a fishing line, a rope, an electric wire, or an optical fiber, the temperature can be monitored along the length direction. When the linear wireless tag 11 is used as a fishing line, as shown in FIG. 3, a temperature sensor by a wireless tag 32 is provided along the fishing line 31, and the temperature from these wireless tags is The signal is received by the receiver 35. Therefore, the wireless tag 33 provided on the fishing line 31 makes it possible to detect the temperature in the water in a range where the fishing line 31 is extended.
[0025]
In addition, if the linear wireless tag 11 is used as a reinforcing fiber material for tires of automobiles and the like, it becomes possible to measure the temperature of the tires, and to detect an overheating of the tires and to issue an alarm by issuing an alarm. It can be prevented beforehand.
[0026]
The above-described linear wireless tag body can be manufactured without using a dissolved polymer as described above. For example, as shown in FIG. 4, if the wireless tags 43 are sandwiched at predetermined intervals between tapes 41 and 42 having adhesive surfaces on one side and bonded together, the wireless tags 43 are internally provided at predetermined intervals. Can be manufactured.
[0027]
Further, as shown in FIG. 5, the linear wireless tag body 51 can be manufactured such that the wireless tag 53 is sandwiched between a plurality of stranded wires 52. In this case, the stranded wire 52 may be provided with an adhesive property, and the wireless tag 53 may be sandwiched by the adhesive force.
[0028]
FIG. 6 shows another manufacturing method of the linear wireless tag body. A MEMS (Micro Electro Mechanical System) substrate provided with a groove 61 (flow channel) is used, and a wireless tag 63 is inserted from one of the grooves. Alternatively, the melted polymer may be flowed from the concave portion 64 storing the polymer solution and drawn out from the other end of the groove to manufacture the linear wireless tag body 65 having the wireless tag 63 in the polymer.
[0029]
Further, in the present invention, not only a wireless tag that detects temperature but also a wireless tag that has a function of detecting light and converting it into an electric signal can be used. The example shown in FIG. 7A has a linear shape in which a wireless tag 73 having a photoelectric conversion function is provided in addition to the luminescent particles 72 at a predetermined interval in the vicinity of the center of the plastic optical fiber 71, that is, at the core. The wireless tag body 74. In this embodiment, when light enters from one side of the optical fiber 71, the luminescent particles 72 emit light, and the light is received by the wireless tag 73, converted into an electric signal, and sent to a wireless receiver (not shown). Things. Therefore, the intensity of light incident on the optical fiber can be detected by a wireless tag, and the intensity can be detected as an electric signal by a receiver installed at a distance.
[0030]
Further, as shown in FIG. 7B, by providing a wireless tag 73 provided in the optical fiber 72 of the linear wireless tag body 71 in the off-center clad portion, the magnitude of the evanescent wave in the clad portion is detected. You can also do so. In this figure, reference numeral 75 denotes the magnitude of the refractive index in the optical fiber 72.
[0031]
As shown in FIG. 8, the linear wireless tag body 81 has a configuration in which the wireless tags 83 are provided at predetermined intervals in the conductive polymer 82, so that when a current is applied, the wireless tags It can be used as an electric wiring between the sensors 83 or as a sensor IC tube for detecting an electric field, a magnetic field, a radio wave, or the like by detecting the intensity of a current or a voltage with the wireless tag 83.
[0032]
Further, the linear wireless tag bodies in which the wireless tags are arranged can be used separately from each other. For example, as shown in FIG. 9, a wireless tag 93 is arranged at a predetermined interval in a polymer 92 having heat-melt and adhesive properties so that the wireless tag 93 can be separated at a position indicated by a dotted line 94. Therefore, heat can be applied to the end of the linear wireless tag body by an iron or the like by an iron or the like for each unit, divided, and fixed to the end of the paper 95 by heat welding. If a temperature sensor is incorporated in the fixed wireless tag 93, the surface temperature of the sheet can be detected.
[0033]
In addition, if a transmitter that informs the position of the wireless tag is built in, the current position of the article with the wireless tag attached can be detected by receiving the radio wave emitted from the wireless tag, and the tracking of the article can be easily performed. Becomes possible.
[0034]
In addition, a wireless tag can be arranged in an elastic material. In FIG. 10, a linear wireless tag body 1001 has a spherical wireless tag 1003 separated by a predetermined distance in an elastic material such as rubber 1002.
[0035]
As shown in FIG. 11, a carbon nanocoil 1102 and a spherical wireless tag 1103 are arranged in a polymer 1101 to manufacture a linear wireless tag body 1104. In this case, if a radio wave of, for example, 5 GHz is received by the carbon nanocoil 1102 and received by a receiver in the wireless tag by inductive coupling, it can be used as an antenna that can easily receive the radio wave.
[0036]
Similarly, a radiation monitor can be manufactured by disposing a wireless tag having a built-in optical sensor in a fluorescent plastic fiber (scintillation fiber) that emits fluorescence by interacting with radiation. Also, if fluorescent particles and a wireless tag incorporating a sensor of the particles are mixed and put into a fiber, photosensitization can be performed, ultraviolet irradiation can be performed, position confirmation can be performed, and the wireless tag sensor can be charged with light. can do.
[0037]
In addition, by embedding a wireless tag with a built-in optical sensor and temperature sensor in a special polymer fiber that emits light or increases in temperature when pressure is applied, a linear wireless tag body that detects pressure is manufactured. be able to.
[0038]
Furthermore, if the magnetic fine particles and the wireless tag incorporating the particle sensor are mixed and arranged in the fiber, the linear wireless tag body can be attached to the metal surface.
[0039]
Further, as shown in FIG. 12, a linear wireless tag body 1204 in which a micro magnet 1202 and a spherical wireless tag 1203 are arranged in a fiber 1201 is formed, and the micro magnet 1202 is coded, and such a linear wireless tag is used. By adsorbing each other at a specific position using the body 1204, for example, the wireless tag 1203a having a built-in temperature sensor and the wireless tag 1203b having a built-in optical sensor can be brought close to each other.
[0040]
As shown in FIG. 13 (a), a method for manufacturing a linear wireless tag body as described above is described. As shown in FIG. 13 (a), a spherical wireless tag body is inserted into a hole 1301 of a plastic 1302 having a property of shrinking when heated. The linear wireless tag body 1304 can be manufactured by inserting the tag 1303 and moving it by air pressure or water pressure, and then applying heat. Alternatively, by moving the inside of the hole 1301 by air pressure or water pressure without fixing the wireless tag 1303, the temperature can be detected by a temperature sensor or the like built in the wireless tag.
[0041]
Further, as shown in FIG. 13B, the linear wireless tag body 1308 in which the spherical wireless tag 1307 is fixed at a predetermined interval is moved into the hollow pipe 1306, and the sensor built in the wireless tag 1307 detects. The position can be changed.
[0042]
As shown in FIG. 14, a wireless tag 1403 is incorporated in a side wall 1402 of a hollow pipe 1401, and a linear sensor for measuring the temperature and pressure of a gas or a fluid by a temperature sensor or a pressure sensor built in the wireless tag 1403. The wireless tag body 1404 can be manufactured. In this case, the wireless tag 1403 may be mixed when a pipe is manufactured by a plastic extrusion molding method.
[0043]
In the linear wireless tag body, as shown in FIG. 15, a spherical wireless tag 1503 is inserted from these minute holes 1501 of a pipe 1502 having minute holes 1501 at a predetermined distance on the side surface, and is indicated by an arrow 1504. It can be manufactured by moving and fixing as described above.
[0044]
Also, as shown in FIG. 16, a spherical wireless tag 1603 is mixed when a plastic fill is created by a T-die method or an inflation method, and the resultant is partially cut into a band to form a string 1604, or a wireless tag is formed. , A plurality of micro-squares 1605 containing the same are cut out, and as shown in FIG. 16B, by bonding them together, a linear wireless tag body 1608 in which the wireless tags 1603 are arranged at predetermined intervals can be manufactured. .
[0045]
Also, as shown in FIG. 17, an electronic circuit that can flexibly change the design by disposing a spherical wireless tag 1703 on a fixed substrate 1701 and connecting those wireless tags by electromagnetic coupling. A substrate can be manufactured.
[0046]
In addition, as shown in FIG. 18A, when a wireless tag 1803 is inserted into an antenna 1801 and electrically connected therebetween, the antenna 1801 can be used as an antenna capable of receiving a wideband electromagnetic wave and processing a signal. . 1804 is a transmission source. In addition, as shown in FIG. 18B, by inserting a wireless tag 1806 in a conductive polymer 1805 having a half wavelength (λ), the antenna can be used as a highly sensitive antenna. Reference numeral 1808 is a support.
[0047]
Next, still another embodiment will be described. A linear wireless tag body 1901 shown in FIG. 19A has a micro sensor IC embedded as a wireless tag 1903 in a polymer fiber 1902. As shown in FIG. 19B, the wireless tag 1903 includes a sensor unit 1904, a photoelectric conversion unit 1905 formed by a PN junction, a circuit unit 1906 including a memory, an RF circuit, and a logic circuit, and further for electromagnetic coupling. Are provided. In some cases, a position sensor for detecting the position of the wireless tag is provided in the wireless tag 1903.
[0048]
Electric power is supplied from outside via a coil 1907, and a signal obtained by the sensor unit 1904 or the photoelectric conversion unit 1905 is transmitted to the outside as an electric signal via the coil 1907. In the case of irradiating light from outside to perform light excitation, it is desirable to use a transparent material for the polymer fiber 1902. If a special polyester-based material that generates heat at a high temperature when absorbing moisture is used as the polymer fiber 1902, the linear wireless tag body can be used as a linear moisture sensor due to diffusion of moisture.
[0049]
In the present invention, an antenna that receives power supply from the outside or transmits an electric signal obtained in the wireless tag by the sensor unit to the outside is embedded in the linear tag body, or on the surface of the linear tag body. Can be provided. Such an embodiment will be described below.
[0050]
In the embodiment of the present invention shown in FIG. 20, a microsensor IC as a wireless tag 2003 is embedded in polystyrene 2004 which is a polymer fiber, and a conductive foil serving as an antenna 2005 is provided on the surface of the polystyrene by printed wiring. is there. Reference numeral 2006 denotes a bump formed of a conductor for connecting the terminal of the wireless tag 2003 and the antenna 2005. As described above, the polystyrene 2004 having the antenna 2005 formed by printed wiring on the surface is coated with polystyrene to form a linear wireless tag body 2001.
[0051]
Although not shown, the wireless tag 2003 has a built-in sensor unit for detecting temperature and position, an RF circuit, a logic circuit, and a photoelectric conversion unit including a PN junction. An electric signal obtained by the wireless tag 2003 is transmitted to the outside by the antenna 2005 via the bump 2006.
[0052]
In the embodiment shown in FIG. 21, the wireless tag 2103 is inserted into a hollow pipe 2104 made of a polymer having a small diameter. A terminal of the wireless tag 2103 in the pipe 2104 is connected to an antenna 2107 provided on the surface of the pipe 2104 by printed wiring through a hole 2106 connected to a lead wire 2105 and provided on a side surface of the pipe 2104. Thus, the linear wireless tag body 2101 is configured. Although not illustrated, the wireless tag 2103 includes a sensor unit, an RF circuit, a logic circuit, and a photoelectric conversion unit including a PN junction. The portion of the pipe 2104 other than the wireless tag 2103 may be filled with an insulator such as polystyrene, or may be left hollow.
[0053]
An electric signal obtained in the sensor unit and the photoelectric conversion unit in the wireless tag 2103 is transmitted to the outside by the antenna 2107 through the lead wire 2105.
[0054]
In this embodiment, when two kinds of appropriate metals forming a thermocouple are used for the antenna 2107 and the lead wire 2105, it is possible to detect the temperature at both ends of the antenna 2107.
[0055]
FIG. 22 shows still another embodiment of the present invention. In this embodiment, as in the embodiment shown in FIG. 20, a wireless tag 2203 composed of a micro IC is embedded in polystyrene 2204 which is a polymer fiber, and an antenna 2205 is formed on the surface of the polystyrene by printed wiring. A conductor foil is provided. Polystyrene 2206 is coated on the printed wiring on the surface, and a coil 2207 of a conductive foil is spirally wired on the coated surface by rotation printing. The antenna 2205 and the coil 2207 are connected via the. Although not shown, the wireless tag 2203 includes a sensor unit, an RF circuit, a logic circuit, and a photoelectric conversion unit including a PN junction. Electric signals obtained in the sensor unit and the photoelectric conversion unit in the wireless tag 2203 are transmitted to the outside by the coil 2207.
[0056]
FIG. 23 shows still another embodiment of the present invention. In this embodiment, a wireless tag 2303 is embedded in a small-diameter electric cable 2304, and a center conductor 2105 is connected to an antenna 2306 provided by printed wiring outside the electric cable 2304 on the way, so that a linear wireless tag is formed. A body 2301 is configured. Although not shown, the wireless tag 2303 includes a sensor unit, an RF circuit, a logic circuit, and a photoelectric conversion unit including a PN junction. An electric signal obtained in the sensor unit and the photoelectric conversion unit in the wireless tag 2303 is transmitted to the outside by an antenna 2306.
[0057]
FIG. 24 shows still another embodiment of the present invention. In this embodiment, a wireless tag 2403 is embedded in a small-diameter electric cable 2404, and a center conductor 2405 is connected to an antenna 2406 and a coil 2407 provided by printed wiring outside the electric cable 2404 on the way, and A wireless tag body 2401 is configured. Although not shown, the wireless tag 2303 includes a sensor unit, an RF circuit, a logic circuit, and a photoelectric conversion unit including a PN junction. An electric signal obtained in the sensor unit and the photoelectric conversion unit in the wireless tag 2303 is transmitted to the outside by the antenna 2406 and the coil 2407.
[0058]
Although only one wireless tag in the linear wireless tag body is shown in the embodiments of FIGS. 20 to 24, a plurality of wireless tags are actually arranged at predetermined intervals in any of the embodiments. In addition, the wireless tag in these embodiments receives power (energy) from outside and outputs an electric signal obtained by the sensor unit as data to the outside.
[0059]
FIG. 25 shows still another embodiment of the present invention. In the figure, a wireless tag 2503 composed of a small IC and an LED 2505 are connected and embedded in a plastic optical fiber (POF) 2502 which is a transparent polymer fiber. The wireless tag 2503 incorporates a sensor unit, an RF circuit, a logic circuit, a photoelectric conversion unit including a PN junction, and a transmitter (described later) whose frequency changes depending on temperature. Is configured.
[0060]
When the wireless tag 2503 is externally irradiated with a light beam as the excitation light 2504, electricity is generated in the photoelectric conversion unit, and power is supplied. The temperature signal is converted into a light signal again in the LED 2505 and transmitted through the POF 2502. The wireless tag 2503 has a sensor unit, and a detection signal obtained by the sensor unit is superimposed as an electric signal to drive the LED 2505. Therefore, the detection signal obtained by the sensor unit is transmitted through the POF 2502 while being superimposed on the optical signal emitted from the LED 2505.
[0061]
FIG. 26 shows still another embodiment of the present invention. In the figure, a wireless tag 2603 composed of a micro IC and an LED 2605 are connected and embedded in a plastic optical fiber (POF) 2602 which is a transparent polymer fiber. The wireless tag 2603 incorporates a sensor unit, an RF circuit, a logic circuit, a photoelectric conversion unit including a PN junction, and a transmitter (described later) whose frequency changes depending on temperature. Is configured. An excitation electromagnetic field 2604 is applied to the wireless tag 2603 from outside. By applying the excitation electromagnetic field, power is supplied from the outside. The power drives the LED 2605, and the temperature information is converted into an optical signal again and transmitted through the POF 2602.
[0062]
The wireless tag 2603 has a sensor unit, and a detection signal obtained by the sensor unit is superimposed as an electric signal to drive the LED 2605. Therefore, the detection signal obtained by the sensor unit is transmitted through the POF 2602 while being superimposed on the optical signal emitted from the LED 2605.
[0063]
FIG. 27 illustrates a Colpitts oscillation circuit as an example of an oscillation circuit whose frequency depends on temperature. In the figure, capacitors C71 and C72 are connected to the base of a transistor Tr7, and a coil L is connected to the other end of these capacitors. Here, the capacitor C72 is a variable capacitance diode whose capacitance changes with temperature.
[0064]
Oscillation frequency f = 1 / 2π (L × C) ^1/2 Where C = C71 × C72 / (C71 + C72).
[0065]
When C71 is much larger than C72, the oscillation frequency f becomes almost 1 / 2π (L7 × C2). ^1/2 And C72 is T ^-1/2 Is proportional to This is for example the case of S.A. M. It is described on pages 79 and 249 of "Physics of Semiconductor Device" by Sze.
[0066]
By providing the oscillation circuit shown in FIG. 27 in the wireless tags 2503 and 2603 shown in FIGS. 25 and 26, the oscillation frequency can be changed depending on the temperature.
[0067]
FIG. 28 shows another circuit example in which the oscillation frequency changes according to the temperature. This circuit is an astable multivibrator, and is composed of two transistors Tr81 and Tr82, two capacitors C81 and C82, two temperature-dependent resistors R81 and R82, and two fixed resistors. The pulse period T of this circuit is given by T = 0.593 (C81 × R81 + C82 × R82).
[0068]
Here, the values of the resistors R81 and R82 that change with temperature are referred to as variable resistors. Thus, when the temperature changes, the cycle of the astable multivibrator changes and the oscillation frequency changes. By providing the oscillation circuit shown in FIG. 28 in the wireless tags 2503 and 2603 shown in FIGS. 25 and 26, the oscillation frequency can be changed depending on the temperature.
[0069]
By the way, for example, temperature information is transmitted as an optical signal and power can be supplied through electromagnetic coupling. FIG. 29 shows such an embodiment. This part is embedded in a plastic optical fiber (POF) 2902 which is a transparent polymer fiber. This component includes an electromagnetic coil 2903, 2904, a Schottky barrier diode 2905, a capacitor 2906, an oscillator 2907, and an LED 2908.
[0070]
The Schottky barrier diode 2905 is for rectifying the alternating current induced in the electromagnetic coil 2903, and this diode and the capacitor 2906 constitute a smoothing circuit. The oscillator 2907 is an oscillator whose output oscillation frequency changes with temperature. While an optical signal emitted from the LED 2908 is transmitted through the POF 2902, electric power can be transmitted to a nearby electromagnetic coil by an electromagnetic field via the electromagnetic coil 2903.
[0071]
FIG. 30 shows a state of transmission of an optical signal and power supply at a position where two wireless tag bodies are connected. In this figure, numbers 3001a to 3008a and numbers 3001b to 3008b correspond to numbers 2901 to 2908 in FIG.
[0072]
On the other hand, the electric signal of the transmitter 3007b in the linear wireless tag body 3001b is transmitted to the LED 3008b, and the optical signal emitted from the LED 3008b is also transmitted to the right. The basic oscillation frequency of the transmitter 3007a is set to fa, and the basic oscillation frequency of the transmitter 3007b is set to fb. Since the oscillation frequency of the transmitter 3007a changes according to the temperature of the wireless tag, and the oscillation frequency of the transmitter 3007b also changes according to the temperature of another wireless tag, the oscillation of the transmitter 3007 as shown by arrows 310 and 31 in FIG. The frequency changes. An electric signal emitted from a temperature-dependent transmitter 3007a in the linear wireless tag body 3001a is transmitted to the LSD 3008a. The light signal emitted from the LED 3008a includes temperature information. The light signal passes through the POF 3002a and is further transmitted rightward through the POF of the linear wireless tag body 3001b.
[0073]
The light signal emitted from the LED 3008a includes a fluctuation in the oscillation frequency of the transmitter 3007a. On the other hand, the optical signal emitted from the LED 3008b includes the fluctuation of the oscillation frequency of the transmitter 3007b. Therefore, the temperature of each wireless tag can be detected by detecting the shift of the optical signal emitted from the LED 3008a and the shift of the optical signal emitted from the LED 3008b.
[0074]
In general, an optical signal emitted from the LED of each wireless tag is detected by incorporating a transmitter whose oscillation frequency changes depending on the temperature in a wireless tag that is arranged at a predetermined interval in the linear wireless tag body. Then, by detecting the frequency shift, the temperature of each wireless tag can be known from the outside. That is, the temperature at each wireless tag can be detected by providing an optical receiver at one end of the linear wireless tag body, separating the frequency of the received optical signal, and detecting a frequency shift from each fundamental frequency.
[0075]
At this time, if the position information of each wireless tag is also included in the optical signal and transmitted, the temperature at each position is detected. Even if the position information is not sent, if the number of wireless tags or the interval between the wireless tags is known, the position of each wireless tag can be estimated and the temperature distribution can be known.
[0076]
On the other hand, an electromagnetic field is formed by the electromagnetic coil 3004a, and an electromotive force is induced in the electromagnetic coil 3003b by the electromagnetic field. The induced electromotive force is rectified by a smoothing circuit including a Schottky barrier diode 3005b and a capacitor 3006b, and is supplied to a transmitter 3007b. Power is transmitted in this manner.
[0077]
By the way, in the above-described embodiment, power is transmitted from the end face of the linear wireless tag body. However, it is also possible to supply electric power to the wireless tag of another linear wireless tag from the middle of the linear wireless tag. FIG. 32 shows the configuration of such another embodiment of the present invention. 32, reference numerals 3201a to 3208a and reference numerals 3201b to 3208b correspond to reference numerals 2901 to 2908 in FIG. In this case, an electromagnetic field is generated by the electromagnetic coil 3204a, and an electromotive force is generated in the electromagnetic coil 3203b by the electromagnetic field. This electromotive force is rectified by a smoothing circuit including a Schottky barrier diode 3205b and a capacitor 3206b, and is supplied to a transmitter 3207b. The output of this transmitter flows to the electromagnetic coil 3204b, and an electromagnetic field is formed.
[0078]
On the other hand, since the oscillation frequency of the transmitter 3207b changes depending on the temperature, the frequency shift of the optical signal of the LED 3208b to which this output is supplied occurs. By receiving this optical signal, the temperature at the transmitter 3207b can be detected.
[0079]
By arranging and fixing the linear wireless tag bodies provided with the wireless tags at predetermined intervals as described above in the vertical and horizontal directions, the wireless tags can be two-dimensionally arranged. For example, as shown in FIG. 33, the above-described linear wireless tag bodies are provided vertically and horizontally on a ceiling 3301, a wall 3302, a curtain 3303, a floor 3304, and a bed 3305. Then, the wireless tag placed inside the wireless tag body is placed two-dimensionally.
[0080]
In addition, if a person's clothes 3306 is formed by knitting the above-described wireless tag body, the wireless tag is arranged on a curved surface along the human body in this case as well.
[0081]
For example, if the curtain 3303 shown in FIG. 33 is made by knitting a linear wireless tag body, it becomes as shown in FIG. That is, when the linear wireless tag body 3401 is knitted vertically and horizontally, each wireless tag 3403 is two-dimensionally arranged. Then, a device for converting temperature and position information into an optical signal is provided in the wireless tag of these linear wireless tag bodies, and a light receiver is arranged at each end of the linear wireless tag body. Then, the temperature at each position can be detected, and as a whole, the two-dimensional temperature distribution in the vertical direction in the room can be known.
[0082]
According to the linear wireless tag provided on the ceiling 3301, a two-dimensional temperature distribution in the horizontal direction on the ceiling of the room can be known. According to the linear wireless tag provided on the clothes 3306, the two-dimensional temperature distribution on the surface of the human body can be known.
[0083]
In addition, if the linear wireless tag bodies are arranged vertically and horizontally, for example, by knitting, the linear wireless tag bodies adjacent to each other can be arranged at a predetermined interval in the vertical direction and the horizontal direction. is there.
[0084]
However, in the present invention, the linear wireless tag bodies are not necessarily arranged vertically and horizontally. For example, a plurality of linear wireless tag bodies may be arranged at predetermined intervals only in the vertical direction.
[0085]
By the way, when the power (energy) and the optical signal are transmitted as data as shown in FIGS. 30 and 32, the wireless tags 3503 are two-dimensionally arranged at predetermined intervals as shown in FIG. Then, the transmission of power becomes as shown by arrow 3504, and the optical signal becomes as shown by arrow 3505. In this case, energy is supplied from one wireless tag to another nearby wireless tag. The optical signal emitted from each wireless tag is transmitted in only one direction.
[0086]
More generally, assuming that wireless tags are two-dimensionally arranged at predetermined intervals as shown in FIG. 36, power (as indicated by an arrow 3604) is transmitted from one of these wireless tags to another wireless tag 3603. Energy). Further, information such as the temperature obtained from the wireless tag is collected as data as shown by an arrow 3605 and transmitted to other wireless tags. In this case, the wireless tag functions as a connection point of information once receiving data transmitted from another wireless tag and transmitting the data to the other wireless tag again.
[0087]
In the system shown in FIG. 36, there are a frequency method and a time-division method for separately transmitting energy and information data. FIG. 37 (a) shows a method of dividing the frequency 3701 of energy transmission from the frequency region 3702 of transmitting information, and FIG. 37 (b) shows a method of changing the transmission timing of the pulse 3703 of energy transmission and the pulse 3704 of information transmission. is there. In the present invention, energy and information may be separated using any of the above-described frequency separation method and time separation method.
[0088]
Here, an information base unit that collects signals from each wireless tag from a plurality of linear wireless tag bodies and transmits the collected information to the outside will be described. As shown in FIG. 38, the ends of the linear wireless tag bodies 3801a, 3801b, 3801c, and 3801d are collected on the film electronic circuit board 3800. Then, an antenna or a coil 3802 is provided at the center of the film electronic circuit board 3800. Information collected from the linear wireless tag body is transmitted from the antenna 3802 to the outside.
[0089]
By the way, in the present invention, if a temperature sensor using a nonvolatile memory is provided in each wireless tag, it is possible to read out the temperature of each wireless tag later. Such an example will now be described. FIG. 39 shows a principle diagram for measuring the maximum temperature. When electrons are confined in a semiconductor, a potential well 3901 is formed, and a certain number of electrons 3902 accumulate in the well before measurement. When the temperature of the semiconductor rises, the probability that electrons 3902 are excited by heat and jump out of potential well 3901 increases. Therefore, the maximum temperature can be estimated by measuring the number of electrons remaining in the potential well 3901 after a predetermined time.
[0090]
As shown in FIG. 40, it is also possible to estimate the maximum intensity of light or radiation emitted within a certain observation time. That is, in the bit information of the electrons 4002 stored in the potential well 4001 formed in the semiconductor, the electrons are excited by the irradiation 4003 of light, cosmic rays, or radiation. Therefore, since the change in the entropy corresponds to the change in the bit information, the maximum intensity of light or radiation (cosmic rays are also a kind of radiation) can be measured.
[0091]
Also, by applying TMR (tunnel magnetoresistance effect) to the retention of a bit memory and applying a magnetic spin 4102 to the electrons 4101 as shown in FIG. 41, magnetic recording becomes possible. Devices using this principle can provide sensors capable of recording the highest magnetic magnitude. This is because the spin state is disturbed by an external magnetic field, and the spin state is recorded as a change in the memory state.
[0092]
In addition, as a sensor for measuring acceleration, a maximum acceleration can be recorded by incorporating a thin film layer for obtaining a piezoelectric effect into a sensor portion and retaining charges generated there.
[0093]
By the way, in the above embodiment, the wireless tag has been described as having a small-diameter spherical shape. However, the wireless tag used in the present invention is not limited to such a shape. In short, as long as the size is about several mm or less, any shape such as a rectangle, a square, and an ellipse may be used.
[0094]
In the above embodiment of the present invention, it has been described that the wireless tags are arranged at predetermined intervals, but in this case, the "predetermined interval" does not mean a fixed fixed interval, but is appropriately spaced, That is, it may be non-uniform, or there may be a part where the wireless tag is in contact.
[0095]
Further, in the above-described embodiment, a case has been described in which a wireless tag having a built-in sensor capable of detecting a temperature and a pressure is used. However, an object to be detected by the sensor is not limited thereto, and any object that can be measured may be used. . Further, the wireless tag used in the present invention does not necessarily need to include a sensor, and may have only a function of simply transmitting the position. As an application example, when the antenna itself incorporated in the linear body is damaged by cutting or the like, the transmission function is lost, so that an abnormality can be detected and building materials and cracks can be monitored. If the position can be specified, a position sensor is not required, and only a sensor that can measure temperature or the like may be used.
[0096]
The receiver used in the present invention may be any receiver that can receive an electric signal transmitted from a wireless tag.
[0097]
【The invention's effect】
As described above, according to the present invention, it is possible to obtain a linear wireless tag body capable of efficiently using a minute wireless tag, a manufacturing method thereof, and the like.
[Brief description of the drawings]
FIG. 1 is a diagram showing a structure of a linear wireless tag body according to an embodiment of the present invention.
FIG. 2 is a diagram illustrating an example of a method for manufacturing a linear wireless tag body according to one embodiment of the present invention.
FIG. 3 is a diagram for explaining a method of using another embodiment of the present invention.
FIG. 4 is a diagram showing a structure of a linear wireless tag body according to another embodiment of the present invention.
FIG. 5 is a diagram showing a structure of a linear wireless tag body according to still another embodiment of the present invention.
FIG. 6 is a diagram illustrating an example of a method of manufacturing a linear wireless tag body according to another embodiment of the present invention.
FIG. 7 is a view showing a structure of a linear wireless tag body according to still another embodiment of the present invention.
FIG. 8 is a diagram showing a structure of a linear wireless tag body according to still another embodiment of the present invention.
FIG. 9 is a diagram for explaining a method of using another embodiment of the present invention.
FIG. 10 is a view showing a structure of a linear wireless tag body according to still another embodiment of the present invention.
FIG. 11 is a view showing a structure of a linear wireless tag body according to still another embodiment of the present invention.
FIG. 12 is a diagram showing a structure of a linear wireless tag body according to still another embodiment of the present invention.
FIG. 13 is a view showing a structure of a linear wireless tag body according to still another embodiment of the present invention.
FIG. 14 is a diagram showing a structure of a linear wireless tag body according to still another embodiment of the present invention.
FIG. 15 is a view showing the structure of a linear wireless tag according to still another embodiment of the present invention.
FIG. 16 is a view showing a method of manufacturing a linear wireless tag body according to still another embodiment of the present invention.
FIG. 17 is a view showing a structure of a linear wireless tag body according to still another embodiment of the present invention.
FIG. 18 is a diagram showing a structure of a linear wireless tag body according to still another embodiment of the present invention.
FIG. 19 is a diagram showing a structure of a linear wireless tag body according to still another embodiment of the present invention.
FIG. 20 is a diagram showing a structure of a linear wireless tag body according to still another embodiment of the present invention.
FIG. 21 is a view showing a structure of a linear wireless tag body according to still another embodiment of the present invention.
FIG. 22 is a view showing a structure of a linear wireless tag body according to still another embodiment of the present invention.
FIG. 23 is a diagram showing a structure of a linear wireless tag body according to still another embodiment of the present invention.
FIG. 24 is a view showing the structure of a linear wireless tag according to still another embodiment of the present invention.
FIG. 25 is a view showing the structure of a linear wireless tag according to still another embodiment of the present invention.
FIG. 26 is a diagram showing a structure of a linear wireless tag body according to still another embodiment of the present invention.
FIG. 27 is a diagram showing an example of a transmitter used in an embodiment of the present invention.
FIG. 28 is a view showing another example of the transmitter used in one embodiment of the present invention.
FIG. 29 is a view showing a structure of a linear wireless tag body according to still another embodiment of the present invention.
30 is a diagram showing an example of a state of optical transmission of power and data on an end face of a linear wireless tag body when the wireless tag shown in FIG. 29 is used.
FIG. 31 is a view for explaining that a data transmission frequency changes due to a temperature change in the embodiment of the present invention shown in FIG. 30;
32 is a diagram illustrating an example of how power is transmitted to another linear wireless tag body by an electromagnetic field using the wireless tag illustrated in FIG. 29.
FIG. 33 is a diagram showing an example in which a linear wireless tag body according to the present invention is provided two-dimensionally.
FIG. 34 is a view for explaining the arrangement of wireless tags when the linear wireless tag body according to the present invention is knitted.
FIG. 35 is a view for explaining how information and power are transmitted when the wireless tag body shown in FIG. 29 is used.
FIG. 36 is a view for explaining how information and power are transmitted when the linear wireless tag bodies according to the present invention are two-dimensionally arranged.
FIG. 37 is a diagram for explaining a method for transmitting information and power using a wireless tag according to the present invention.
FIG. 38 is a view for explaining an information unit in the embodiment of the present invention.
FIG. 39 is a diagram illustrating the principle of an example of a temperature sensor provided in the wireless tag of the present invention.
FIG. 40 is a view for explaining the principle of measuring the maximum intensity of light or radiation provided in the wireless tag of the present invention.
FIG. 41 is a view for explaining the principle of an example of a magnetic sensor provided in the wireless tag of the present invention.
[Explanation of symbols]
11, 44, 51, 65, 74, 81, 1001, 1104, 1204, 1304, 1404, 1901, 2001, 2101, 2201, 301, 2401, 2501, 2601, and 290 ... a linear wireless tag body; ..Polymer, 13, 33, 43, 53, 63, 73, 83, 93, 1003 ... wireless tag, 22 ... pipe, 23 ... molten polymer, 25 ... pump, 26 ... Nozzle, 28 ... take-up reel, 31 ... fishing line, 35 ... receiver, 41, 42 ... tape.

Claims (22)

A small-diameter wireless tag with a built-in transmitting unit for wirelessly transmitting an electric signal;
A linear holding body for holding the wireless tag separated by a predetermined distance. A small-diameter wireless tag having a sensor and a transmitting unit that wirelessly transmits a value measured by the sensor as an electric signal,
A linear holding body for holding the wireless tag separated by a predetermined distance. The linear wireless tag according to claim 2, wherein the wireless tag has an antenna held in the holder. The linear wireless tag according to claim 2, wherein the wireless tag has an antenna partially exposed on a surface of the holder. The linear wireless tag body according to claim 2, wherein the wireless tag includes a coil spirally printed on a surface of the holding body by printed wiring. A system of a linear wireless tag body made by knitting a plurality of linear holders that hold a small-diameter wireless tag in a predetermined interval,
The wireless tag body includes a transmission unit for wirelessly transmitting an electric signal, and is a system of a linear wireless tag body. A system of a linear wireless tag body made by knitting a plurality of linear holders that hold a small-diameter wireless tag in a predetermined interval,
The wireless tag has a sensor and a transmission unit for wirelessly transmitting a value measured by the sensor as an electric signal. Transmission for transmitting an electric signal from the transmission unit of a linear wireless tag body including a small-diameter wireless tag including a transmitting unit for transmitting an electric signal wirelessly and a linear holder for holding the wireless tag at predetermined intervals Steps and
A position detecting step of receiving the electric signal transmitted in the transmitting step and detecting a position of the wireless tag transmitting the electric signal. A linear wireless tag body comprising a sensor and a small-diameter wireless tag incorporating a transmitter for wirelessly transmitting a value measured by the sensor as an electric signal, and a linear holder for holding the wireless tag at a predetermined interval. A transmitting step of transmitting an electric signal from the transmitting unit,
And a sensor value detecting step of receiving the electric signal transmitted in the transmitting step and detecting a position of the wireless tag transmitting the electric signal and a value measured by the sensor of the wireless tag. A sensor value detection method using a tag body. An input step of inputting a small-diameter wireless tag having a built-in transmitter for transmitting an electric signal wirelessly into the polymer being melted,
A withdrawal step of withdrawing from the nozzle the mixture of the wireless tag and the polymer that has been melted in by the throwing step,
Cooling the mixture withdrawn in the withdrawing step to obtain a linear wireless tag body in which the wireless tags are spaced apart from each other by a predetermined distance in a linear polymer. Of manufacturing a wireless tag body. A small-diameter wireless tag including a sensor and a detection unit that detects a value measured by the sensor as an electric signal,
An optical signal generation unit that generates an electric signal detected by the wireless tag as an optical signal,
A linear holder for holding the optical signal generator and the wireless tag at a predetermined interval,
A linear wireless tag body, wherein the optical signal generated by the optical signal generation unit is transmitted through the holder. The linear wireless tag bodies are arranged in parallel, and an electric signal obtained by the sensor in the wireless tag arranged in these linear wireless tag bodies is used as an optical signal generated by the optical signal generating unit. The linear wireless tag body according to claim 11, wherein the linear wireless tag body is obtained from an end of the linear wireless tag body. A plurality of the linear wireless tag bodies are arranged in parallel and in a direction orthogonal to these, and the electric signal obtained by the sensor in the wireless tag arranged in these linear wireless tag bodies is converted into the optical signal generation unit. 12. The linear wireless tag body according to claim 11, wherein an electrical signal at each wireless tag position is obtained two-dimensionally by obtaining an optical signal generated from the end of the linear wireless tag body. . A small-diameter wireless tag including a sensor and a transmission unit that transmits a value measured by the sensor as an electric signal, and a power supply unit that receives power supply by electromagnetic induction,
A linear holding body that holds the wireless tag separated by a predetermined distance,
A linear wireless tag body, characterized in that an electric signal having a value measured by the sensor is transmitted from the transmitting unit when power is supplied to the power supply unit of the wireless tag. 15. The linear wireless tag according to claim 14, wherein the supply of power to the power supply unit and the transmission of a value measured to the sensor use different bands in frequency. The linear wireless tag according to claim 14, wherein the power supply to the power supply unit and the transmission of the measured value to the sensor are performed at different times. A plurality of the linear wireless tag bodies are arranged in parallel and in a direction orthogonal thereto, and the wireless tags arranged in these linear wireless tag bodies are supplied with power by electromagnetic induction from adjacent wireless tags,
By obtaining the electric signal obtained by the sensor in the wireless tag from the end of the linear wireless tag body as an optical signal generated by the optical signal generating unit, two-dimensionally at the position of each wireless tag The linear wireless tag according to claim 14, wherein an electric signal is obtained. A small-diameter coil having a first electromagnetic coil, a smoothing circuit for smoothing an electromotive force induced in the electromagnetic coil, an oscillation circuit supplied with the output of the smoothing circuit and oscillating, and a second electromagnetic coil passing the oscillation circuit output. A wireless tag,
An optical signal generation unit that generates an electric signal detected by the wireless tag as an optical signal,
A linear holder for holding the optical signal generator and the wireless tag at a predetermined interval,
The oscillation circuit is an oscillation circuit whose oscillation frequency changes with temperature,
The linear wireless tag body, wherein the wireless tag receives supply of power to the first electromagnetic coil, and an optical signal generated by the optical signal generator is transmitted through the holder. 19. The linear wireless tag according to claim 18, wherein the oscillating circuit is a Colpitts oscillating circuit having a capacitor whose capacitance changes with temperature. 19. The linear wireless tag according to claim 18, wherein the transmission circuit is an astable multivibrator whose resistance changes with temperature. 19. The linear wireless tag according to claim 18, wherein the optical signal generator is an LED. 19. The linear wireless tag according to claim 18, wherein the holder is formed of a plastic optical fiber.

Images