KR101419263B1 - Remote temperature sensing device and related remote temperature sensing method - Google Patents

Abstract

An apparatus having a temperature sensor attachable to a rotating item using a temperature sensor of a plurality of magnetically coupled rectangular amorphous magnetic alloy strips, wherein at least one of the strips has a predetermined ferromagnetic Curie temperature, Wherein the other strip has a magnetic permeability of greater than 2000.

Description

TECHNICAL FIELD [0001] The present invention relates to a remote temperature sensing device and a remote temperature sensing method using the remote temperature sensing device,

The present invention relates to a remote temperature sensing method and a remote temperature sensing device for rotating items using Curie magnetic transfer of an amorphous ferromagnetic material and more particularly to a remote temperature sensing device and a remote temperature sensing device for a rotating part of a moving machine, And a method is provided.

There are a number of technologies and tools that can measure temperature, including classical mercury thermometers, thermocouples, resistance thermometers, and well-known temperature indicators such as bi-metals. All of these utilize some basic physical phenomena that vary with temperature, and for this reason, each technology and tool has its own unique characteristics. For example, mercury thermometers are effective for visual sensing, but are not suitable for converting temperatures to electrical signals. In order to read the temperature electrically, a thermocouple using the thermoelectric effect of the metal is more suitable, but in the case of the thermocouple, the electrical signal must be wound on a voltmeter which converts the electrical signal to the related temperature. In addition, a resistance thermometer using the temperature dependence of the resistance of the metal must also be wound on a voltmeter. These methods require wires to be connected between the sensor and the temperature indicator and are therefore not suitable for remote temperature sensing. As remote temperature sensing becomes necessary, as in the case of measuring the temperature of a moving tire, a temperature sensor using the temperature dependency of the semiconductor resistance is used. However, this type of sensor requires a power source to send a signal. The sensor is mounted on a rotating rim or tire. Therefore, it is difficult for the vehicle body to transmit electric power to the rotating tire. In addition, it is essential to use a battery for the temperature monitor device to operate properly. This kind of sensor transmits temperature-dependent signals to the detector wirelessly in response to temperature for later processing. This type of temperature sensing for automotive tires has become increasingly necessary to protect pneumatic tires from rupture due to increased temperature of the tire, mainly during tire use.

One such sensor can be realized by using a Curie magnetic transition of a ferromagnetic material such as iron, which has a ferromagnetic Curie temperature with ferromagnetic disappearance according to all related phenomena such as high magnetization and permeability. Changes in the magnetization and permeability of the ferromagnetic material at the Curie temperature can be easily measured remotely by a conventional magnetometric method. US. Patent No. No. 4,052,696 discloses a tire temperature sensing circuit using Curie magnetization of a ferrite component. The magnetic variation in the Curie transition is detected by the inductive coupling effect. Therefore, this technique requires a very close spacing between the ferrite-based sensor and the fixed detector in order to maintain the level of the detected signal at a reliable level. For example, as described in S. Chikazumi (John Wiley & Sons, NY, 1964), page 498 of "Physics of Magnetism", the distance must be very close because ferrite has a relatively low magnetic permeability of 80-2000. Therefore, there is a need for temperature sensors that do not require a battery and can be remotely detected within the required detection range. In addition, a temperature sensing device with as little electrical circuitry as possible is needed.

The present invention provides a temperature sensor adopted for detecting occurrence of a temperature change of a rotating item such as an automobile tire, and a remote temperature sensing method using the temperature sensor.

The present invention eliminates the need to attach batteries to the sensor. Schematically, the sensor includes a plurality of magnetically coupled amorphous magnetic metal strips. These strips may also have a predetermined ferromagnetic Curie temperature for detection of at least one of the strips, and the other strips or other strips are arranged in a format having a high magnetic permeability. Chemical compositions of amorphous alloy strips suitable for the temperature sensor of the present invention are provided.

The remote temperature sensing apparatus and method of the present invention minimize the use of electrical circuit elements.

In one embodiment, a remote temperature sensing device having a temperature sensor that can be mounted on a rotating item, the temperature sensor comprising a plurality of magnetically coupled rectangular amorphous magnetic alloy strips, wherein at least one of the strips Provides a remote temperature sensing device having a predetermined ferromagnetic Curie temperature and the other strip having a magnetic permeability greater than 2000.

In one embodiment, the predetermined amorphous magnetic alloy strip having a ferromagnetic Curie temperature has a composition formula as Fe _a M _b B _c Si _d C _e [a, b, c, d, and e are atomic ratios, 61 <a <81, 0 <b <15, 2 <c <25, 0 <d <10, 0 <e≤18, a + b + c + d + e = 100 and up to 50% , And M is a selected one of Cr, Mo, Nb, Ti, and W].

Preferably, the other amorphous magnetic alloy strip has a magnetic permeability of more than 2000 and has a composition formula Fe _a Ni _b Co _c M _e B _f Si _g C _h [a, b, c, e, 0 <b <41, 0 <c <72, 0 <e <4, 1 <f <20, 0 <g <16, 0 <h <4, a + b + c + e + f + g + h = 100, and M is one selected from Cr, Mo, and Mn.

In one embodiment, the sensing device

The predetermined ferromagnetic Curie temperature and a composition formula _{Fe a M b B c Si d} C e [a, b, c, d, and e is an atomic ratio, 61 <a <81, 0 <b <15, 2≤c <25 , 0 <d <10, 0 <e≤18, and a + b + c + d + e = 100 and up to 50% of the Fe content can be replaced by Ni, M is Cr, Mo, Nb , Ti and W], and an amorphous magnetic alloy strip having a composition essentially defined by the magnetic permeability of more than 2000 and the composition formula Fe _a Ni _b Co _c M _e B _f Si _g C _h [a, b , c, e, f, g and h are atomic ratios of 3 <a <80, 0 <b <41, 0 <c <72, 0 <e <4, 1 <f <20, 0 <g <16 , 0 < h < 4, a + b + c + e + f + g + h = 100 and M is at least one selected from Cr, Mo and Mn. Alloy strips.

In one embodiment, the other strip of sensing device

Wherein the two amorphous magnetic alloy strips comprise two amorphous magnetic alloy strips having a magnetic permeability exceeding 2000, wherein the two amorphous magnetic alloy strips comprise Fe _a Ni _b Co _c M _e B _f Si _g C _h [a, b, c, e, f , g and h are atomic ratios of 3 <a <80, 0 <b <41, 0 <c <72, 0 <e <4, 1 <f <20, 0 <g <16, 0 <h <4 , a + b + c + e + f + g + h = 100, and M is one selected from Cr, Mo, and Mn.

In yet another embodiment,

The predetermined ferromagnetic Curie temperature has a composition formula _{Fe a M b B c Si d} C e [a, b, c, d, and e is an atomic ratio, 61 <a <81, 0 <b <15, 2≤c < And M can be replaced by Ni, up to 50% of the Fe content, and M is at least one element selected from the group consisting of Cr, Mo, Nb, Ti, and W); < RTI ID = 0.0 &gt; a < / RTI &gt; And,

Has a magnetic permeability exceeding 2000, the composition formula Fe _a Ni _b Co _c M _e B _f Si _g C _h [a, b, c, e, f, g, h are an atomic ratio to, 3 <a <80, 0 0 <g <16, 0 <h <4, a + b + c + e + f + g + h = 100 And M is one selected from the group consisting of Cr, Mo, and Mn], and the other is a strip comprising two amorphous magnetic alloy strips having the same chemical composition.

In yet another embodiment,

A magnetic permeability of more than 2,000 and a composition formula Fe _a Ni _b Co _c M _e B _f Si _g C _h [a, b, c, e, f, Satisfying the conditions of <41, 0 <c <72, 0 <e <4, 1 <f <20, 0 <g <16, 0 <h <4, a + b + c + e + f + g + and, M is Cr, Mo, an amorphous magnetic alloy strip with a composition formula of at least one having the composition defined by is one selected from _{Mn] Fe a M b b c} Si d c e [a, b, c, d, and e are D + e = 100, and satisfying the following conditions: 61 < a < 81, 0 < b < 15, Mo, Nb, Ti, and W, and the composition formula Fe _a Ni _b Co _c M _e B _f Si _g C _h [a, b, c, e, f, g and h are atomic ratios of 3 <a <80, 0 <b <41, 0 <c <72, 0 <e <4, 1 <f < A plurality of amorphous materials having different chemical compositions essentially defined by 0 <h <4, a + b + c + e + f + g + h = 100 and M is one of Cr, Magnetic alloy strips.

Preferably, the temperature sensor can be interrogated by a magnetic field, and the magnetic response of the temperature sensor can be electromagnetically detected.

In one embodiment, the sensing device includes at least one coil for emanating an interrogating magnetic field and at least one coil for detecting the reaction signal of the temperature sensor.

Preferably, the rotating item may be a vehicle tire.

Further aspects or advantages of the invention will be further elucidated by way of concrete examples and examples for carrying out the invention.

The present invention provides a temperature sensor used for detecting occurrence of a temperature change of a rotating item such as an automobile tire, and a remote temperature sensing method using the temperature sensor. The present invention also eliminates the need to attach a battery to a sensor and minimizes the use of an electrical circuit element.

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a graph of the BH behavior of the magnetic amorphous metal strips according to an embodiment of the present invention, showing the relationship of the magnetic induction B to the applied magnetic field. One is 80 mm long and is shown by curve 10, and the other is 40 mm long and is shown by curve 11.
2 is a schematic diagram illustrating two basic arrangements (2A and 2B) for a sensor strip, in accordance with an embodiment of the present invention.
Figure 3 is a graph showing the temperature dependence of the three strips sensor 2A of the present invention embodiment of Figure 2, which includes a sensor strip component 20 based on METGLAS &lt; RTI ID = 0.0 &gt; 2714A. &Lt; / RTI &gt;
FIG. 4 is a graph showing the temperature dependence of the 3-strip sensor 2A of the embodiment of the present invention in FIG. 2, which includes a sensor strip component 20 based on METGLAS® 2705M.
5 is a graph depicting the temperature dependence of a two-strip embodiment of the present invention in FIG. 2, wherein the sensor strip component 22 is based on METGLAS 2714A and the temperature sensing strip component 23 is cut from AM2 A curved line 50 is shown in FIG.
FIG. 6 is a graph showing the pressure dependency of the 3-strip sensor 2A of the embodiment of the present invention in FIG. 2, wherein the sensor strip component 20 is based on METGLAS 2714A, and when the temperature sensing strip component 23 is cut from AM1, 60, and a curve 61 when cut from AM2.
FIG. 7 is a graph showing the temperature dependence of the 3-strip sensor 2 of the embodiment of the present invention in FIG. 2, wherein the sensor strip component 20 is based on METGLAS? 2714A and the harmonic signal at 30 psi, And the curve 72 represents the harmonic signal at 50 psi.
8 is a schematic diagram showing a remote sensing device of an embodiment of the present invention having a rotating wheel 80, a temperature sensing strip sensor 81, an activation coil and a detection coil 82.
Fig. 9 shows the detection signals measured in the remote sensing device shown in Fig. 8. Fig. A three-strip sensor 2A consisting of a sensor strip component 20 based on METGLAS? 2714A of the embodiment of the invention of FIG. 2 and a temperature sensitive strip component 23 cut from AM1 was used.
10 shows a remote temperature sensing device according to an embodiment of the present invention for a car tire 80 that includes a temperature sensor 81 and a pair of activation coils and detection coils 82. [ The tire 80 is attached to a tire rim B.
11 is a schematic diagram showing a conventional temperature sensing monitor.
12 is a flow chart depicting the operation of an embodiment of a remote temperature sensing method for a rotating item in accordance with the present invention.

Hereinafter, the present invention will be described in detail.

An amorphous magnetic alloy strip for a temperature sensor according to an embodiment of the present invention was prepared according to the procedure outlined in Example 1. (See below.) The first step of the embodiment of the present invention is to form the amorphous alloy strip To check the basic magnetics of the magnet. 1 shows a function of the magnetic induction B (T) for a magnetic field H (A / m) applied to amorphous magnetic strips, with curve 10 for 80 mm length and curve 11 for 40 mm length to be. The amorphous magnetic strips according to embodiments of the present invention, which graphically illustrate the magnetic induction of the strips in FIG. 1, have a thickness of 20 μm and a width of 2 mm. And from commercially available METGLAS® 2714A ribbons with saturable magnetic induction at about 0.6 T and near-zero magnetostriction. The ribbon shows a square or rectangular BH loop when the strip is 75 mm or more in length. Due to the demagnetizaing effect which is dependent on the length to width ratio, the BH behavior shown in Fig. 1 is different for two strips of different lengths, and shorter strips are more shear than longer ones, BH loop or behavior. Differences in BH behavior of amorphous metal strips according to embodiments of the present invention result in corresponding differences in higher harmonics generation. The harmonic response of the amorphous magnetic alloy strips according to embodiments of the present invention is characterized by the method described in Example 3.

Generally, thin magnetic strips with square or rectangular shaped BH behavior generate higher harmonics of the fundamental frequency at which the strip is excited magnetically. The amplitude and higher harmonic spectra that emanate the magnetic field from the magnetic strip depend on the degree of nonlinearity of the BH behavior. The degree of nonlinearity of a given magnetic strip depends on the length to width ratio of the strip. As an example of this relationship in Table 1, other amorphous magnetic alloys with different ferromagnetic Curie temperatures &amp;thetas; _f are described. The alloys AM1 to AM4 in Table 1 are based on amorphous magnetic Fe-MB-Si-C. Here, the Fe content includes 61 to 81% in terms of atomic ratio, up to 50% of Fe can be replaced with Ni, and M selected from Cr, Mo, Nb, Ti and W can be 0 to 15% B contains 2 to 25% in atomic ratio, Si contains 0 to 10% in atomic ratio, and C contains 0 to 18% in atomic ratio.

More examples of amorphous alloys that perform a similar function are given in Table 3.

Table 1 below shows the harmonic generation of magnetic amorphous metal strips (data obtained by the method described in Example 3 with a fundamental excitation frequency of 2.4 kHz).

alloy
θ _f , Curie temperature
(° C) 25 ^th Harmonic signal (mV) ℓ = 40 mm ℓ = 75 mm ℓ = 110 mm AM1
(Fe ₆₂ Cr ₁₄ B ₁₈ Si ₅ ) 93 17 140 355 AM2
_{(Fe 66 .5 Cr 13 B 18} Si 2 .5) 99 23 258 359 AM3
(Fe ₆₁ Mo ₇ B ₂₀ Si ₆ ) 222 11 49 173 AM4
(Fe ₇₁ Mo ₆ B ₂₀ Si ₃ ) 213 17 143 343 METGLAS® 2705M 350 35 323 1230 METGLAS® 2714A 230 28 520 1590

According to Table 1, it can be seen that the harmonic signal is not linearly proportional to the strip length, l. The factors contributing to the generation of the harmonic signal are referred to sequentially. The above-mentioned magnetic erasure effect is the largest and the magnetic volume difference is the second largest. To illustrate this, two METGLAS® 2714A 40 mm long amorphous metal magnetic strips, each generating about 22 mV of a 25 ^th harmonic signal, as given in Table 1, are applied to a 75 mm long strip or to a somewhat larger magnetic volume And the harmonic signals were measured. 25 ^th from two 40 mm long strips The harmonic signal was 31 mV, about the same level as 28 mV obtained from one 40 mm long strip, which is much less than 520 mV obtained from one 75 mm long strip. From this it can be seen that placing two short strips parallel to one another with the same magnetic volume as one long strip does not produce the same level of harmonic signals as one long strip. These significant differences have been utilized in the embodiments of the present invention as described below.

Two 40 mm long amorphous metal magnetic strips 20 as embodiments of the present invention prepared from METGLAS® 2705M or METGLAS® 2714A ribbon of Table 1 are connected to another amorphous metal magnetic strip 21 as shown in FIG. Here, the amorphous metal magnetic strip 21 has a lower Curie temperature than strips 40 mm long, such as AM1 to AM4 described in Table 1. These higher temperature signal arrays and the higher harmonic signals generated from embodiments of the present invention were measured using the method of the example. Table 2 summarizes the 25 ^th harmonic signals generated from each of the three-strip temperature sensors.

Table 2 below shows the harmonic signals at room temperature from the 3-strip temperature sensor of the present invention embodiment using 40 mm long connecting strip material 21 in the middle as shown in FIG. 2 from the other alloys listed in Table 1.

alloy
25 ^th harmonic signal (mV) METGLAS® 2714A METGLAS® 2705M AM1 830 210 AM2 740 200 AM3 480 170 AM4 540 385

The temperature dependence of the harmonic signal was measured by the method described in Example 3. As a result, two main harmonic generation strips 20 based on METGLAS® 2714A at θ _f = 230 ° C. are shown in FIG. 3, and harmonic generation strips based on METGLAS® 2705M at θ _f = 350 ° C. 20 is shown in Fig. Because the abscissa of Figs. 3 and 4 represents a percent change, a direct comparison between the different temperature sensors of the present embodiment is possible. As shown in FIGS. 3 and 4, the temperature sensor of the present invention embodiment showed a large change in the generation of harmonic signals at the Curie temperature of selected temperature-sensitive amorphous metal strips. Therefore, the temperature of the environment in which the temperature sensor of the embodiment of the present invention can be arranged is set to be equal to or close to the Curie temperature of the temperature sensitive strip component 21 in the sensor arrangement state of FIG.

Another similar example is shown in FIG. 2, which illustrates that the amorphous magnetic metal strip 22 selected with one of the METGLAS® 2714A or METGLAS® 2705M ribbon listed in Table 1 is deposited on the amorphous magnetic metal strip 22 in AM1 to AM4 of Table 1 having a Curie temperature lower than the Curie temperature of strip 22 And connected to another amorphous magnetic metal strip 23 cut out from any one of them. Higher harmonic signals were measured using the method of Example 3 from the above temperature sensor arrangement and embodiments of the present invention.

An example of the temperature dependence of the harmonic signal for two sensors having one 40-mm long temperature sensitive strip 23 and another having a different Curie temperature and having a strip 22 of 40 mm in length with different harmonic generation is shown in FIG. The width of each strip is 2 mm. The first case is shown in curve 5, where the harmonic signal generating strip 22 is cut from the METGLAS® 2714A ribbon and the temperature sensing strip 23 is made from the AM1 alloy ribbon in Table 1. The second case is shown in FIG. , The curve 51 shows the case where the harmonic signal generating strip 22 is cut from the METGLAS? 2714A ribbon and the temperature sensing strip 23 is made from the AM3 alloy ribbon shown in Table 1. As can be clearly seen in FIG. 5, in both cases, the Curie temperature θ _f = 93 ° C. in the case of using AM1 and the Curie temperature θ = 93 ° C. in the case of using AM3 for the temperature sensitive strip components AM 1 and AM 3 corresponding to the component 23 in FIG. It can be seen that the harmonic signal is greatly reduced at the temperature θ _f = 222 ° C. Therefore, the temperature of the environment in which the temperature sensor of the embodiment of the present invention is placed is determined to be equal to or close to the Curie temperature of the particular temperature sensitive strip selected as the strip component 23 in the sensor array 2B of FIG.

The temperature-sensitive amorphous magnetic alloy strips employed in the temperature sensors shown in FIGS. 1 to 5 and Tables 1 and 2 have a Curie temperature ranging from 90 ° C to 220 ° C for the purpose of providing embodiments at a level at which the Curie temperature does not lose generality .

Since the Curie temperature of the amorphous magnetic alloy continuously changes as the chemical properties of the alloy change, this can be used for the temperature sensor of the present invention embodiment by selecting the Curie temperature to be detected, that is, a predetermined temperature. The only requirement is that the Curie temperature of the temperature sensitive strip component should be lower than the Curie temperature of the main harmonic signal generating strip component. Examples of amorphous magnetic alloys for the temperature sensitive strip component of the instant embodiment of the present invention are shown in Table 3 together with the Curie temperature of each alloy. Therefore, preferred amorphous alloy strips for the temperature sensitive strip component according to the embodiment of the present invention have the composition formula Fe _a M _b B _c Si _d C _{e where} a, b, c, d and e are 61 <a < b <15, 2? c <25, 0 <d <10, 0 <e? 18, a + b + c + d + e = 100 and up to 50% And M is a selected one of Cr, Mo, Nb, Ti, and W]. Alloys AM1, AM2, AM3, and AM4 described in Table 1 correspond to alloys 21, 20, 12, and 13 of Table 3, respectively.

Table 3 below shows amorphous magnetic alloys for the temperature sensitive strip component of the embodiment of the present invention.

alloy Furtherance Curie temperature, &amp;thetas; _f (DEG C) One Fe ₇₇ Cr ₂ B ₁₇ Si ₄ 344 2 Fe ₈₀ Cr ₁ B ₁₇ Si ₂ 341 3 Fe ₇₆ Mo ₃ B ₁₇ Si ₄ 318 4 Fe ₇₆ Cr ₃ B ₁₇ Si ₄ 313 5 Fe ₇₉ Cr ₂ B ₁₇ Si ₂ 309 6 Fe ₇₉ Mo ₂ B ₁₇ Si ₂ 300 7 Fe ₇₈ Cr ₃ B ₁₇ Si ₂ 283 8 Fe ₇₅ Ti ₅ B ₂₀ 273 9 Fe ₇₈ Mo ₃ B ₁₇ Si ₂ 256 10 Fe ₄₀ Ni ₃₄ Mo ₆ B ₂₀ 241 11 Fe ₇₅ W ₅ B ₂₀ 224 12 Fe ₆₇ Mo ₇ B ₂₀ Si ₆ 222 13 Fe ₇₁ Mo ₆ B ₂₀ Si ₃ 213 14 Fe ₇₄ Mo ₆ C ₁₈ B ₂ 212 15 Fe ₇₅ Nb ₅ B ₂₀ 209 16 Fe ₇₄ Mo ₆ B ₂₀ 183 17 Fe ₇₂ Mo ₈ C ₁₈ B ₂ 143 18 Fe ₇₀ Mo ₁₀ C ₁₈ B ₂ 123 19 Fe ₇₂ Mo ₈ B ₂₀ 122 20 _{Fe 66 .5 Cr 13 B 18 Si} 2 .5 99 21 Fe ₆₂ Cr ₁₄ B ₁₈ Si ₆ 93 22 Fe ₆₈ Mo ₁₂ C ₁₈ B ₂ 62

As illustrated in Table 1, for harmonic signal generating strips for implementation of the present invention, commercially available amorphous alloying ribbons with near-zero magnetostriction, such as METGLAS® 2705M and METGLAS® 2714A, are suitable. Any amorphous magnetic alloy ribbon can be selected as a harmonic signal generating component of the temperature sensor for realizing the present invention, provided that it has a low coercive force showing a BH magnetic hysteresis behavior in the form of a square or a rectangle. Amorphous alloys meeting these requirements have a magnetic permeability much higher than 2000, which is the level of magnetic permeability required for effective higher harmonic generation. For example, among all the alloys listed in Table 4, the Fe ₈₀ B ₁₀ Si ₁₀ alloy has the lowest permeability as measured by the conventional method, but it is about 7000 for 0.01T excitation at 1kHz . Therefore, the amorphous magnetic alloys suitable for the harmonic generating strip component of the embodiment of the present invention have a composition formula Fe _a Ni _b Co _c M _e B _f Si _g C _h [a, b, c, e, , 3 <a <80, 0 <b <41, 0 <c <72, 0 <e <4, 1 <f <20, 0 <g <16, 0 <h <4, a + b + c + e + f + g + h = 100, and M is one selected from Cr, Mo, and Mn]. Another requirement of the inventive harmonic signal generating strip component is that the Curie temperature of the harmonic signal generating strip should be higher than the Curie temperature of the selected temperature sensitive strip component.

Table 4 below shows examples of the harmonic generation sensor strip of the present invention.

alloy Curie temperature, &amp;thetas; _f (DEG C) Fe ₈₀ B ₁₀ Si ₁₀ 395 Fe ₇₈ Ni ₁₂ Mo ₂ B ₁₆ Si ₂ 379 Fe ₇₅ Ni ₄ Mo ₃ B ₁₆ Si ₂ 295 _{Co 70 .5 Fe 4 .5 B 15} Si 10 422 Co _{68 .2} Fe _{3 .8} Mn ₁ B ₁₂ Si ₁₅ 266 _{Co 67 .8 Fe 4 .2 Mo 1} B 12 Si 15 227 Co ₃₆ Ni ₃₅ Fe ₈ Mo ₁ B ₁₈ Si ₂ 329 Co ₃₆ Ni ₃₅ Fe ₈ Mo ₁ B ₁₀ Si ₁₀ 305 Ni ₃₅ Co ₃₅ Fe ₁₀ B ₁₈ Si ₂ 285 Ni ₄₀ Co ₃₀ Fe ₉ Mo ₁ B ₁₈ Si ₂ 280 Ni ₄₀ Co ₃₀ Fe ₁₀ B _{14 .5} Si ₂ C _{3 .5} 269 Ni ₄₀ Co ₃₀ Fe ₉ Mo ₁ B ₁₄ Si ₆ 240 Ni ₃₈ Co ₃₀ Fe ₁₀ Mo ₂ B ₁₄ Si ₆ 215 Ni ₃₈ Co ₃₀ Fe ₁₀ Mo ₂ B ₁₅ Si ₂ C ₃ 205 Ni ₄₀ Co ₃₀ Fe ₉ Mo ₁ B ₆ Si ₁₄ 200 Ni ₃₈ Co ₃₀ Fe ₁₀ Mo ₂ B ₁₀ Si ₁₀ 195 Ni ₄₀ Co ₃₀ Fe ₈ Mo ₂ B ₁₈ Si ₂ 168 Ni ₃₈ Co ₃₀ Fe ₁₀ Mo ₂ B ₆ Si ₁₄ 155

The Curie temperatures of the amorphous alloys listed in Table 4 vary from 155 to 422 ° C so that alloys having a higher? _F available as a harmonic generating strip component of the embodiment of the present invention and a lower? _F available as a temperature sensitive strip component It is possible to use the alloy of the branches.

The pressure dependence of the harmonic signal at room temperature was measured by the method of Example 4 for the 3-strip temperature sensor of the sensor array 2A of FIG. 2, and the results are shown in FIG. 6, the first case is cut out of the METGLAS (R) 2714A ribbon and the temperature sensing strip 21 is cut out from the AM1 alloy ribbon of Table 1 and is shown by curve 60. In the second case, the harmonic signal generating strip 20 is cut from the METGLAS® 2714A ribbon and the temperature sensing strip 21 is cut from the AM2 alloy ribbon in Table 1 and is represented by curve 61. As a result of the measurement, it can be seen that the harmonic signal is independent of the pressure of the environment, so that the tire temperature sensor of the embodiment of the present invention can be installed.

The temperature dependency of the harmonic signal at a predetermined pressure corresponding to the pressure of the pneumatic tire was measured by the method described in Example 5, and the result is shown in Fig. For the three cases of FIG. 7, the harmonics were measured with a three-strip temperature sensor of sensor array 2A of FIG. 2, where the harmonic signal generating strip 20 was cut from METGLAS® 2714A, 1 &lt; / RTI &gt; AM1 alloy ribbon. The harmonic signal at 30 psi in FIG. 7 is represented by curve 70, the harmonic signal at 40 psi is represented by curve 71, and the harmonic signal at 50 psi is represented by 72. In the case of the temperature-sensitive strip element 21, the Curie temperature, that is in the AM1 corresponding to the component 21 has a two noteworthy is that the harmonic signal is greatly reduced in the θ _f = 93 ℃.

Therefore, although the pressure of the pneumatic tire is independent, the temperature of the pneumatic tire is measured at a temperature equal to or close to the Curie temperature of the particular temperature sensitive strip selected for this component in the sensor array 2A of Fig.

Fig. 8 shows a temperature sensor 81 of the sensor array 2A of Fig. 2 mounted on a wheel 80. Fig. A magnetic field is provided by the activation coil 82 and a harmonic signal generated from the temperature sensor 81 is monitored by the detection coil. The details are described in Example 6. While the wheel is rotating, a signal is detected by the detection coil 82 drawn in Fig. Figure 9 shows the detected signal at a rotational speed of 60 rpm. This result shows that the harmonic signals are effectively detected when the temperature sensor passes through the activation and detection coils. When the sensing component temperature rises, an ambient temperature harmonic signal is detected in the coil 82 along the curve drawn in Figures 5 and 7 of the harmonic signal detected in the coil 82. [

If the temperature sensitive component 21 or 23 of FIG. 2 becomes non-ferromagnetic as a result of the component temperature increasing above the Curie temperature, the harmonic signals are no longer detected in the activation / detection coil 82. This change in the detection signal is then sent to the operator of the rotating machine, such as a vehicle, as an alert or stimulus signal for machine operation after this point in time. In one such example in FIG. 10, the temperature sensor 81 of the embodiment of the present invention is attached to the automobile tire 80. FIG. A pair 82 of the activation coil and the detection coil was attached to the outside of the tire 80 so as to face the temperature sensor 81. [ Item B in Fig. 10 is a tire rim having a tire 80. Fig. The advantages of this tire temperature sensing arrangement using the temperature sensor of the present invention embodiment are compared to the temperature sensing arrangement of the prior art of FIG. 11 described in US Patent No. 4,052,696. In Fig. 11, a copper sensing temperature sensing component 26 is attached to the tire rim 20. And the tire rim is connected to a set of inductors 18 by wires labeled 26a, 26b and 24 which are connected to a signal monitoring circuit near the inductive component 18. [ The temperature sensing component 26 has a ferrite core having a Curie magnetic transition temperature. When the temperature of the ferrite core reaches the Curie temperature of the core, the inductance of the temperature sensing circuit transmitted to the signal monitoring circuit changes. As shown in Table 22.2 of "Physics of Magnetism" on page 498 of S. Chikazumi (John Wiley & Sons, NY, 1964), commercially available ferrites have a magnetic permeability of about 80 to 2000, The change in inductance at the Curie temperature of the ferrite is not large. In addition, the Curie temperature of commercially available ferrite is limited to several temperatures. For example, according to that given in the book Table 22.2 of Chikazumi, relative to the Mn-Zn, Cu-Zn, Ni-Zn, In the case of Mg-Zn, Mg-Mn ferrite _{θ f (℃) = 110,} 90, 130, 120, and 130, respectively. On the other hand, the amorphous alloys used in embodiments of the present invention have magnetic permeability well above 2000. And the Curie temperature of the alloys continues to change as the chemical properties of the alloys change. Therefore, a predetermined temperature in the temperature sensing apparatus embodying the present invention can be selected for all desirable temperatures that we need. The advantage described above is reflected in the signal detected and shown in Fig. 9 with respect to the detection coil 82 in Fig.

Example 1

sample preparation

The amorphous magnetic alloys used in embodiments of the present invention are described in U.S. Pat. 4,142,571. &Lt; tb &gt;&lt; TABLE &gt; The casting material is in the form of a ribbon, the thickness is about 20 μm, and the width is from 25 mm to 213 mm.

The cast ribbon is then cut into a narrower ribbon shape having a width ranging from 0.5 mm to 10 mm. If necessary, heat the stripped ribbon to change the magnetic properties of the ribbon. Thus, the prepared ribbon is cut into pieces having various lengths.

Example 2

A commercially available dc BH loop measuring device was used to measure magnetic induction B as a function of applied magnetic field H. Figure 1 is obtained using this apparatus.

Example 3

A temperature sensor strip component according to Example 1 was located in an exciting AC field exciting at a predetermined fundamental frequency and a higher harmonic signal was detected by a coil comprising a strip component.

The exciting coil and the signal detecting coil were wound around a bobbin with a diameter of about 50 mm. The number of turns of the activation coil and the signal detection coil was about 180 and about 250, respectively. A non-magnetic tube was inserted in a 50 mm diameter bobbin, and the sample heating element was positioned, thereby changing the strip sample temperature. The temperature of the strip component is measured by a thermocouple directly bonded to one end of the strip component. The fundamental exciting AC field was chosen at 2.4 kHz. The voltage at the activation coil is about 80 mV. The 25 ^th harmonic voltage from the signal detection coil was measured as a commercially available digital voltmeter.

Example 4

The temperature sensor strip component of Example 1 was placed in an exciting AC field which excited at a predetermined fundamental frequency and then a higher harmonic response by the coil comprising the strip component was detected. The exciting coil and the signal detecting coil were wound around a bobbin with a diameter of about 50 mm. The number of turns of the activation coil and the signal detection coil was about 180 and about 250, respectively. The internal pressure of the tube changes and is measured by a pressure gage. The fundamental excitation AC field was 2.4 kHz and the voltage at the activation coil was about 80 mV. The 25 ^th harmonic voltage from the signal detection coil is measured with a commercially available digital voltmeter.

Example 5

A higher harmonic response by the coil containing the strip component was detected after it was placed in an exciting AC field at a predetermined fundamental frequency. The exciting coil and the signal detecting coil were wound around a bobbin with a diameter of about 50 mm. The number of turns of the activation coil and the signal detection coil was about 180 and about 250, respectively. A non-magnetic tube was inserted in a 50 mm diameter bobbin, and the sample heating element was positioned, thereby changing the strip sample temperature. The internal pressure of the tube changes and is measured by a pressure gage. The fundamental excitation AC field was 2.4 kHz and the voltage at the activation coil was about 80 mV. The 25 ^th harmonic voltage from the signal detection coil is measured with a commercially available digital voltmeter.

Example 6

A temperature sensor strip component according to Example 1 was installed in a WHEEL and an 8-shaped activation and detection coils were installed 20 mm away from the temperature sensor strip. The number of turns of the activation coil and the signal detection coil was set to 40 to 320, respectively. The activation coil is 15 cm x 15 cm, and the detection coil has a diameter of 10 cm. The fundamental excitation AC field was 2.4 kHz and the voltage at the activation coil was about 500 mV. The 13 ^th harmonic pressure from the signal detection coil was measured with a commercially available oscilloscope. The wheel is rotated by a common speed change motor.

Figure 12 illustrates the operation of method 1200 when implementing the present invention. As an embodiment of the present invention, a method 1200 using a remote temperature sensing device having a temperature sensor mounted on a rotating item is provided. The method includes the steps of magnetically coupling a plurality of rectangular amorphous magnetic alloy strips 1202; And attaching a temperature sensor to the rotating item 1204. At least one of the strips has a predetermined ferromagnetic Curie temperature and the other strip has a magnetic permeability of greater than 2000 to make a temperature sensor.

In one embodiment of the present invention, the method comprising the predetermined the amorphous magnetic alloy strip having a ferromagnetic Curie temperature of the composition formula as Fe _a M _b B _c Si _d C _e [a, b, c, d, and e are atomic ratios, And a Fe content of 50% or more, satisfying the following conditions: 61 <a <81, 0 <b <15, 2 <c <25, 0 <d <10, 0 <e≤18, a + b + c + % Ni, and M is a selected one of Cr, Mo, Nb, Ti, and W).

In yet another embodiment of the present invention, the method is characterized in that the at least one amorphous magnetic alloy strip has a magnetic permeability greater than 2000 and a composition formula Fe _a Ni _b Co _c M _e B _f Si _g C _h [a, b, c, e , f, g and h are the atomic ratios of 3 <a <80, 0 <b <41, 0 <c <72, 0 <e <4, 1 <f <20, 0 <g <16, 0 <h M < 4 &gt;, a + b + c + e + f + g + h = 100, and M is one of Cr, Mo and Mn.

In one embodiment of the present invention, the method further comprises providing amorphous magnetic alloy strips, wherein one amorphous magnetic alloy strip having a predetermined ferromagnetic Curie temperature has a composition formula Fe _a M _b B _c Si _d C _e [a b, c, d, and e are atomic ratios of 61 < a < 81, 0 & + d + e = 100, and up to 50% of the Fe content can be replaced by Ni, and M is a selected one of Cr, Mo, Nb, Ti, W, The amorphous magnetic alloy strip has a magnetic permeability exceeding 2000 and a composition formula Fe _a Ni _b Co _c M _e B _f Si _g C _{h where} a, b, c, e, f, g, 0, 0 <b <41, 0 <c <72, 0 <e <4, 1 <f <20, 0 <g <16, 0 <h <4, a + b + c + e + f + g + h = 100, and M is one selected from Cr, Mo and Mn].

In yet another embodiment of the present invention, the method further comprises preparing at least two amorphous magnetic alloy strips for the other strip of the sensing device. Wherein at least one of the strips has a magnetic permeability greater than 2000 and the two amorphous magnetic alloy strips have a composition formula Fe _a Ni _b Co _c M _e B _f Si _g C _h [a, b, c, e, h is the atomic ratio and 3 <a <80, 0 <b <41, 0 <c <72, 0 <e <4, 1 <f <20, 0 <g < b + c + e + f + g + h = 100, and M is one of Cr, Mo, and Mn.

In one embodiment of the present invention, the method further comprises preparing two amorphous magnetic alloy strips. In this case, one amorphous magnetic alloy strip has a predetermined ferromagnetic Curie temperature and a composition formula Fe _a M _b B _c Si _d C _e [a, b, c, d, and e are the atomic ratios of 61 <a <81 and 0 <b C, d, e, e, and e can be replaced by Ni, up to 50% of the Fe content, And M is a selected one of Cr, Mo, Nb, Ti and W, and the other strip has a magnetic permeability exceeding 2000, and the amorphous magnetic alloy strips have a composition defined by the composition formula Fe _{a Ni b Co c M e b f} Si g c h [a, b, c, e, f, g, h are an atomic ratio, 3 <a <80, 0 <b <41, 0 <c <72, 0 and M is at least one element selected from the group consisting of Cr, Mo, and Mn among the elements satisfying the following conditions: <e <4, 1 <f <20, 0 <g <16, 0 <h <4, a + b + c + e + f + Having the same chemical composition essentially defined by the selected one.

In another embodiment of the present invention, the method comprises the steps of: providing a magnetic permeability of greater than 2000 and a composition formula Fe _a Ni _b Co _c M _e B _f Si _g C _h [a, b, c, e, 0 <b <41, 0 <c <72, 0 <e <4, 1 <f <20, 0 <g <16, 0 <h <4, a + b + c + e + f + g + h = satisfies 100 and, M is Cr, Mo, as the composition formula to prepare at least one amorphous magnetic alloy strip having the composition essentially defined by is one selected from Mn] Fe _a M _b B _c Si _d C _{e where} a, b, c, d and e are the atomic ratios of 61 <a <81, 0 <b <15, 2 c <25, 0 <d < Mo, Nb, Ti, and W, and a composition formula Fe (Fe), wherein a + b + c + d + e = 100 and up to 50% _a Ni _b Co _c M _e B _f Si _g C _{h where} a, b, c, e, f, g and h are the atomic ratios of 3 <a <80, 0 <b <41, 0 < 0 <e <4, 1 <f <20, 0 <g <16, 0 <h <4, a + b + c + e + f + g + &Lt; RTI ID = 0.0 &gt; and / or < / RTI &gt; Further comprising preparing a plurality of amorphous magnetic strips.

As an embodiment of the present invention, the method further comprises interrogating the temperature sensor by a magnetic field and electromagnetically detecting a reaction signal of the temperature sensor.

The interrogating of the temperature sensor uses at least one coil for emanating an interrogating magnetic field and a remote sensing device for sensing the magnetic signal of the temperature sensor At least one other coil may be used.

In one embodiment, a temperature sensor may be attached to a rotating item, including attaching a temperature sensor to the vehicle tire.

While the invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, .

Claims (20)

A remote temperature sensing device having a temperature sensor that can be mounted on a rotating item,
Wherein the temperature sensor comprises a plurality of magnetically coupled rectangular amorphous magnetic alloy strips, wherein at least one of the strips has a predetermined ferromagnetic Curie temperature and the other strip has a magnetic permeability exceeding 2000 / RTI &gt;
The method according to claim 1,
The amorphous magnetic alloy strips having a predetermined ferromagnetic Curie temperature have a composition formula of Fe _a M _b B _c Si _d C _{e where} a, b, c, d, and e are the atomic ratios of 61 <a <81 and 0 <b < 15, 2? C <25, 0 <d <10, 0 <e? 18, a + b + c + d + e = 100, up to 50% M is a selected one of Cr, Mo, Nb, Ti, and W].
The method according to claim 1,
The other amorphous magnetic alloy strip having a magnetic permeability exceeding 2000 has a composition formula Fe _a Ni _b Co _c M _e B _f Si _g C _{h where} [a, b, c, e, f, g, , 3 <a <80, 0 <b <41, 0 <c <72, 0 <e <4, 1 <f <20, 0 <g <16, 0 <h <4, a + b + c + e + f + g + h = 100, and M is a selected one of Cr, Mo, and Mn.
The method according to claim 1,
The predetermined ferromagnetic Curie temperature and a composition formula _{Fe a M b B c Si d} C e [a, b, c, d, and e is an atomic ratio, 61 <a <81, 0 <b <15, 2≤c <25 , 0 <d <10, 0 <e≤18, and a + b + c + d + e = 100 and up to 50% of the Fe content can be replaced by Ni, M is Cr, Mo, Nb , Ti, and W], wherein the amorphous magnetic alloy strip has a composition essentially defined by; And
A magnetic permeability of more than 2,000 and a composition formula Fe _a Ni _b Co _c M _e B _f Si _g C _h [a, b, c, e, f, Satisfying the conditions of <41, 0 <c <72, 0 <e <4, 1 <f <20, 0 <g <16, 0 <h <4, a + b + c + e + f + g + And M is at least one selected from Cr, Mo, and Mn, and the other amorphous magnetic alloy strip
And a temperature sensor.
The method according to claim 1,
The other strip of the sensing device,
Comprising two amorphous magnetic alloy strips having a magnetic permeability in excess of 2000,
The two amorphous magnetic alloy strips have a composition formula Fe _a Ni _b Co _c M _e B _f Si _g C _{h where} a, b, c, e, f, g, b <41, 0 <c <72, 0 <e <4, 1 <f <20, 0 <g <16, 0 <h <4, a + b + c + e + f + g + And M is a selected one of Cr, Mo and Mn.
The method according to claim 1,
The predetermined ferromagnetic Curie temperature and a composition formula _{Fe a M b B c Si d} C e [a, b, c, d, and e is an atomic ratio, 61 <a <81, 0 <b <15, 2≤c <25 , 0 <d <10, 0 <e≤18, and a + b + c + d + e = 100 and up to 50% of the Fe content can be replaced by Ni, M is Cr, Mo, Nb , Ti, and W], wherein the amorphous magnetic alloy strip has a composition essentially defined by; And
A <80, 0 <b <41, 0 <c <h, where a, b, c, e, f, g, and h are atomic ratios of the composition formula Fe _a Ni _b Co _c M _e B _f Si _g C _h And M satisfies the following relationships: 0 <e <4, 1 <f <20, 0 <g <16, 0 <h <4, a + b + c + e + f + , Mn) having a magnetic permeability of greater than 2000, comprising two amorphous magnetic alloy strips having the same chemical composition as essentially defined by the other strip
And a temperature sensor.
The method according to claim 1,
A magnetic permeability of more than 2,000 and a composition formula Fe _a Ni _b Co _c M _e B _f Si _g C _h [a, b, c, e, f, Satisfying the conditions of <41, 0 <c <72, 0 <e <4, 1 <f <20, 0 <g <16, 0 <h <4, a + b + c + e + f + g + And M is at least one selected from the group consisting of Cr, Mo, and Mn; and at least one amorphous magnetic alloy strip having an essentially defined composition. And
The composition formula _{Fe a M b B c Si d} C e [a, b, c, d, and e is an atomic ratio, 61 <a <81, 0 <b <15, 2≤c <25, 0 <d <10 , 0 < e < 18, a + b + c + d + e = 100 and up to 50% of the Fe content can be replaced by Ni, and M is selected from Cr, Mo, Nb, is one; essentially defined, the composition formula Fe _a Ni _b Co _c M _e B _f Si _g c _h by [a, b, c, e, f, g, h are an atomic ratio, 3 <a <80, 0 0 <g <16, 0 <h <4, a + b + c + e + f + g + h = 100 And M is a selected one of Cr, Mo, and Mn], and a plurality of amorphous magnetic alloy strips
And a temperature sensor.
The method according to claim 1,
Wherein the temperature sensor is interrogated by a magnetic field and a reaction signal of the temperature sensor is electromagnetically detected.
The method of claim 8,
Wherein the sensing device has at least one coil for emanating an interrogating magnetic field and at least one coil for detecting the magnetic response of the temperature sensor.
The method according to claim 1,
Wherein the rotating item is a tire of a vehicle.
A method of using a remote temperature sensing device having a temperature sensor capable of being mounted on a rotating item,
Magnetically connecting a plurality of rectangular shaped amorphous magnetic alloy strips with at least one strip having a predetermined ferromagnetic Curie temperature and the other strip having a magnetic permeability exceeding 2000, to form a temperature sensor; And
Attaching a temperature sensor to a rotating item
Gt; a &lt; / RTI &gt; remote temperature sensing device.
The method of claim 11,
The composition formula _{Fe a M b B c Si d} C e [a, b, c, d and e is an atomic ratio, 61 <a <81, 0 <b <15, 2≤c <25, 0 <d <10, 0 < e &lt; 18 and a + b + c + d + e = 100 and up to 50% of the Fe content can be replaced by Ni, and M is a selected one of Cr, Mo, Nb, &Lt; / RTI &gt; further comprising the step of preparing said amorphous magnetic alloy strips having a predetermined ferromagnetic Curie temperature to have a composition essentially defined by said method.
The method of claim 11,
A magnetic permeability of more than 2,000 and a composition formula Fe _a Ni _b Co _c M _e B _f Si _g C _h [a, b, c, e, f, Satisfying the conditions of <41, 0 <c <72, 0 <e <4, 1 <f <20, 0 <g <16, 0 <h <4, a + b + c + e + f + g + And M is one selected from the group consisting of Cr, Mo, and Mn. &Lt; Desc / Clms Page number 12 &gt;
The method of claim 11,
Further comprising the step of preparing the amorphous magnetic alloy strips,
An amorphous magnetic alloy strip having a predetermined ferromagnetic Curie temperature has a composition formula Fe _a M _b B _c Si _d C _{e where} a, b, c, d, and e are the atomic ratios of 61 <a <81 and 0 <b C, d, e, e, and e can be replaced by Ni, up to 50% of the Fe content, , M is a selected one of Cr, Mo, Nb, Ti and W]
The other amorphous magnetic alloy strip has a magnetic permeability exceeding 2000, and Fe _a Ni _b Co _c M _e B _f Si _g C _h [a, b, c, e, f, g, , 3 <a <80, 0 <b <41, 0 <c <72, 0 <e <4, 1 <f <20, 0 <g <16, 0 <h <4, a + b + c + e + f + g + h = 100, and M is one of Cr, Mo, and Mn.
The method of claim 11,
Further comprising preparing the at least one strip and the other strip having a predetermined ferromagnetic Curie temperature of the sensing device by preparing at least two amorphous magnetic alloy strips,
Wherein the at least one strip has a magnetic permeability of greater than 2000 and wherein each of the at least one strip and the at least one other strip has a composition formula Fe _a Ni _b Co _c M _e B _f Si _g C _h [a, b, c, e, 4, 1 <f <20, 0 <g <16, 0 <h <f, g, h are the atomic ratios of 3 <a <80, 0 <b <41, 0 <c <72, 0 <e < 4, a + b + c + e + f + g + h = 100, and M is one of Cr, Mo and Mn. Way.
The method of claim 11,
Further comprising the step of preparing the two amorphous magnetic alloy strips,
A single amorphous magnetic alloy strip has a predetermined ferromagnetic Curie temperature and a composition formula Fe _a M _b B _c Si _d C _{e where} a, b, c, d, and e are the atomic ratios of 61 <a <81 and 0 <b < 15, 2? C <25, 0 <d <10, 0 <e? 18, a + b + c + d + e = 100, up to 50% M is a selected one of Cr, Mo, Nb, Ti and W], and
The other strip has a magnetic permeability exceeding 2000 and a composition formula Fe _a Ni _b Co _c M _e B _f Si _g C _{h where} a, b, c, e, f, g, b <41, 0 <c <72, 0 <e <4, 1 <f <20, 0 <g <16, 0 <h <4, a + b + c + e + f + g + And M is a selected one of Cr, Mo and Mn.
The method of claim 11,
Magnetic permeability and a composition formula exceeding _{2000 Fe a Ni b Co c M} e B f Si g C h [a, b, c, e, f, g, h is 3 <a <80, 0 < b <41, 0 a + b + c + e + f + g + h = 100, and M is an integer satisfying 0 <e <4, 1 <f <20, 0 <g < Cr, Mo, and Mn], the at least one amorphous magnetic alloy strip having a composition essentially defined by; And
The composition formula _{Fe a M b B c Si d} C e [a, b, c, d, and e is an atomic ratio, 61 <a <81, 0 <b <15, 2≤c <25, 0 <d <10 , 0 < e < 18, a + b + c + d + e = 100 and up to 50% of the Fe content can be replaced by Ni, and M is selected from Cr, Mo, Nb, essentially as defined in by is one], expressed by a composition formula Fe _a Ni _b Co _c M _e B _f Si _g C _h [a, b, c, e, f, g, h is 3 <a <80, 0 < b <41 , 0 <c <72, 0 <e <4, 1 <f <20, 0 <g <16, 0 <h <4, a + b + c + e + f + g + h = M is one selected from the group consisting of Cr, Mo, and Mn], the method comprising the steps of: preparing a plurality of amorphous magnetic alloy strips having different chemical compositions,
Further comprising the steps < RTI ID = 0.0 &gt; of: < / RTI &gt;
The method of claim 11,
Interrogating the temperature sensor by a magnetic field; And
Electromagnetically detecting a reaction signal of the temperature sensor
Further comprising the steps &lt; RTI ID = 0.0 &gt; of: &lt; / RTI &gt;
19. The method of claim 18,
The step of interrogating the temperature sensor comprises:
Using one or more coils to emanate an interrogating magnetic field; And
Using one or more coils to detect the magnetic response of the temperature sensor
Gt; a &lt; / RTI &gt; remote temperature sensing device.
The method of claim 11,
Wherein attaching the temperature sensor to a rotating item comprises attaching the temperature sensor to a vehicle tire.

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