Non-polarity correction and displacement measuring device for an object using a search coil type sensor

Abstract

An embodiment of the present application provides a technique for measuring the position, displacement, and the like of a ferrous object, capable of preventing detection lag due to a range in which the magnetic field is temporarily weakened (a non-polarity range) when a polarity change occurs with respect to the sensor as the ferrous object is displaced. An object non-polarity correction and displacement measuring device using a probe coil type sensor according to an embodiment of the present application includes a plurality of sensors each having a housing having an internal space, a core formed to be introduced into the internal space of the housing, and a coil wound around a portion of an outer peripheral surface of the housing corresponding to the position of the core. The plurality of sensors are arranged in parallel, respectively, and the winding positions of the core and the coil with respect to one housing are different from the winding positions of the core and the coil with respect to the other housing, and an induced magnetic field is formed in accordance with a change in distance from a ferrous (Fe) object.

Description

Technical Field

[0001] The present invention relates to a device for non-polarity correction and displacement measurement of objects using a detection coil type sensor. More specifically, it relates to a technology for measuring the position, displacement, etc. of an iron-containing object, which can prevent the following situation: when the polarity of the iron-containing object changes relative to the sensor as the iron-containing object is displaced, a detection delay is caused by a range in which the magnetic field is temporarily weakened (a non-polarity range). Background Art

[0002] Magnetic sensors utilize a variety of technologies, including Squid, Fiber-Optic, Flux-Gate, and Magnetic Impedance, and are being advanced and applied in various industrial fields. In particular, with the advent of the Fourth Industrial Revolution and the emergence of various IoT applications, the application of magnetic sensor technology in daily life is also expanding.

[0003] Subsequently, companies such as Samsung Electronics in Korea and Honeywell abroad are researching and developing further miniaturized chip-type magnetic sensors and conducting various R&D activities to improve detection sensitivity and range and reduce detection errors.

[0004] Korean Patent Registration No. 10-0867375 (Title of Invention: Apparatus and Method for Measuring Position and Direction Information of a Moving Body Using Three Magnetic Sensors) discloses a method comprising: a setting step of setting two magnetic sensors corresponding to a surface formed by the x- and y-axes, respectively, on the moving body, and a magnetic sensor corresponding to the z-axis on the moving body; a storing step of measuring the Earth's magnetic field corresponding to each of the x-, y-, and z-axes, and storing reference magnetic field information values ​​in an internal memory; a judging step of measuring the magnitude of the magnetic field along the x-, y-, and z-axes while the moving body moves, and then judging whether the absolute value of the difference between the measured z-axis magnetic field value and the z-axis reference magnetic field value is less than an error range of the magnetic sensors; and an updating step of updating the direction information value of the moving body using the x- and y-axis magnetic field measurement values ​​if the absolute value of the difference between the measured z-axis value and the reference value is determined to be less than the error range of the sensors in the judging step.

[0005] Prior art literature:

[0006] Patent Document: Korean Patent Registration No. 10-0867375 Summary of the Invention

[0007] Technical problems to be solved

[0008] An object of the present invention is to detect the position, displacement, etc. of an object using the micromagnetic field of an iron-containing object without making any changes to the core and coil that do not have a magnetic component.

[0009] Furthermore, the present invention aims to prevent detection delay caused by a range where the magnetic field is temporarily weakened (non-polarity range) when the polarity of the sensor changes as the ferrous object is displaced.

[0010] Another object of the present invention is to be able to detect not only when a ferrous object has been displaced relative to a fixed sensor, but also when the sensor itself has been displaced.

[0011] The technical problems to be solved by the present invention are not limited to the above-mentioned technical problems. Those skilled in the art should be able to clearly understand other technical problems not mentioned based on the following description.

[0012] Means used to solve problems

[0013] The structure of the present invention for achieving the above-mentioned object is characterized in that it includes multiple sensors, each of which has a housing having an internal space; a core formed to be introduced into the internal space of the housing; and a coil wound around a portion of the outer peripheral surface of the housing corresponding to the position of the core. The multiple sensors are arranged in parallel, and the positions of the core and coil relative to one housing are different from the positions of the core and coil relative to other housings. The induced magnetic field is formed according to the change in distance from the iron (Fe) object.

[0014] In one embodiment of the present invention, one end of a coil included in one sensor is connected to one end of a coil included in another sensor, and the other end of the coil included in the one sensor is connected to the other end of the coil included in the other sensor.

[0015] In one embodiment of the present invention, it also includes: an impedance matching unit connected to the respective wires connected to the plurality of coils to perform impedance matching; and an amplifying unit connected to the impedance matching unit to amplify the microcurrent and microvoltage generated when the object approaches the sensor.

[0016] In one embodiment of the present invention, it further includes: a first control unit connected to the amplifying unit, analyzing the waveforms of the amplified current and voltage; and a second control unit connected to the first control unit, analyzing the position change of the object or the sensor.

[0017] The structure of the present invention for achieving the above-mentioned object is characterized in that it includes a sensor, wherein the sensor comprises: a housing having an internal space; a plurality of cores formed to be introduced into the internal space of the housing; and a plurality of coils wound around respective portions of the outer peripheral surface of the housing corresponding to respective positions of the plurality of cores, wherein the plurality of coils are arranged in series, one core is formed separately from the other cores, and an induced magnetic field is formed according to changes in the distance from an object containing iron (Fe).

[0018] In one embodiment of the present invention, one end of one coil among the plurality of coils is connected to one end of the other coils, and the other end of the one coil is connected to the other end of the other coils.

[0019] In one embodiment of the present invention, it further includes: an impedance matching unit connected to the respective wires connected to the multiple coils to perform impedance matching; and an amplifying unit connected to the impedance matching unit to amplify the microcurrent and microvoltage generated when the object approaches the sensor.

[0020] In one embodiment of the present invention, it further includes: a first control unit connected to the amplifying unit, analyzing the waveforms of the amplified current and voltage; and a second control unit connected to the first control unit, analyzing the position change of the object or the sensor.

[0021] The structure of the present invention for achieving the above-mentioned purpose includes a plurality of sensors, each of which comprises: a housing having an internal space; a core formed to be introduced into the internal space of the housing; and a coil wound around a portion of the outer peripheral surface of the housing corresponding to the position of the core. The plurality of sensors are arranged radially and form an induced magnetic field according to changes in the distance between the sensors and an object containing iron (Fe).

[0022] In one embodiment of the present invention, one end of a coil included in one sensor is connected to one end of a coil included in another sensor, and the other end of the coil included in the one sensor is connected to the other end of the coil included in the other sensor.

[0023] In one embodiment of the present invention, it also includes: an impedance matching unit connected to the respective wires connected to the plurality of coils to perform impedance matching; and an amplifying unit connected to the impedance matching unit to amplify the microcurrent and microvoltage generated when the object approaches the sensor.

[0024] In one embodiment of the present invention, it further includes: a first control unit connected to the amplifying unit, analyzing the waveforms of the amplified current and voltage; and a second control unit connected to the first control unit, analyzing the position change of the object or the sensor.

[0025] Effects of the Invention

[0026] The effects of the present application based on the above-described structure are as follows: the change in the micro magnetic field and the magnetic flux of the ferrous object can be detected, and the position, displacement, and the like of the ferrous object can be detected with ultra-low power.

[0027] Further, the effects of the present application are that, when the polarity with respect to the sensor is changed as the ferrous object is displaced, even if a range in which the magnetic field is temporarily weakened (a non-polarity range) occurs, the magnetic field of the ferrous object can be detected by the adjacent other sensor or coil, and the device can normally and continuously operate.

[0028] Further, the effects of the present application are that the detection and measurement can be performed regardless of the configuration of the non-polarity correction and displacement measurement device of the present application and the like.

[0029] Further, the effects of the present application are that the change in the micro magnetic field and the magnetic flux of the ferrous object can be detected, and the same performance can be exerted regardless of the influence of air, soil, water, and the like.

[0030] It should be understood that the effects of the present application are not limited to the above-described effects, and include all effects that can be inferred from the structure of the application described in the specification or claims of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0031] Figure 1 is a schematic diagram of a sensor based on the first embodiment of the present application.

[0032] Figure 2 is a schematic diagram of a non-polarity correction and displacement measurement device based on the first embodiment of the present application.

[0033] Figure 3 is a schematic diagram of a sensor based on the second embodiment of the present application.

[0034] Figure 4 is a schematic diagram of a non-polarity correction and displacement measurement device based on the second embodiment of the present application.

[0035] Figure 5 is a schematic diagram of a magnetic field region of a sensor based on each embodiment of the present application.

[0036] Figure 6 is a schematic diagram of a sensor based on the third embodiment of the present application.

[0037] Figure 7 is a schematic diagram of a non-polarity correction and displacement measurement device based on the third embodiment of the present application.

[0038] Figure 8 is a schematic diagram of a non-polarity correction and displacement measurement device based on the fourth embodiment of the present application.

[0039] Figure 9 and Figure 10 FIG. 4 is a graph showing a signal pattern when an object passes through the sensor according to the first embodiment of the present invention. DETAILED DESCRIPTION

[0040] A most preferred embodiment of the present invention includes multiple sensors, each of which includes: a housing having an internal space; a core formed to be introduced into the internal space of the housing; and a coil wound around a portion of the outer circumference of the housing corresponding to the position of the core. The multiple sensors are arranged in parallel, and the positions of the core and coil relative to one housing are different from the positions of the core and coil relative to other housings. The induced magnetic field is generated according to the distance from the iron (Fe) object.

[0041] The present invention is described below with reference to the accompanying drawings. However, the present invention can be implemented in many different ways and is not limited to the embodiments described herein. Furthermore, in the drawings, portions not relevant to the description are omitted to facilitate a clearer description of the present invention. Similar portions are designated by similar reference numerals throughout the specification.

[0042] Throughout this specification, when a part is described as being "connected (connected to, in contact with, or coupled to) another part, this includes not only cases where the part is "directly connected" but also cases where the part is "indirectly connected" via other components. Furthermore, when a part is described as "including" a certain structural element, unless otherwise specified, this does not exclude other structural elements and the part may include other structural elements.

[0043] The terms used in this specification are only used to illustrate specific embodiments and are not intended to limit the present invention. In addition to situations where the context clearly indicates different meanings, singular expressions also include plural situations. It should be understood that in this specification, terms such as "including" or "having" are intended to indicate the existence of features, numbers, steps, actions, structural elements, parts or combinations thereof recorded in the specification, and are not intended to exclude the existence or additional possibility of one or more other features, numbers, steps, actions, structural elements, parts or combinations thereof.

[0044] Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

[0045] Figure 1 1 is a schematic diagram of a sensor 10 according to a first embodiment of the present invention. Figure 2 This is a schematic diagram of a non-polarity calibration and displacement measurement device according to a first embodiment of the present invention. Figure 3 This is a schematic diagram of a sensor 10 according to a second embodiment of the present invention. Figure 4This is a schematic diagram of a non-polarity calibration and displacement measurement device according to a second embodiment of the present invention. Figure 5 Schematic diagram of the magnetic field area of ​​the sensor 10 according to various embodiments of the present invention. Figure 5 (a) is a diagram showing a situation in which an iron (Fe)-containing object 60 moves relative to the non-polarity correction and displacement measurement device according to the first embodiment of the present invention. Figure 5 (b) is a diagram showing the movement of an iron-containing object 60 relative to the nonpolarity correction and displacement measurement device according to the second embodiment of the present invention. The directions can be set based on the top, bottom, left, and right directions of each figure. The same applies to the following. In the drawings of the present invention, for convenience, the north and south poles of the iron-containing object 60 are shown, but this does not indicate that the object itself is a magnet or electromagnet.

[0046] First, a non-polarity calibration and displacement measuring device according to a first embodiment of the present invention will be described.

[0047] like Figure 1 and Figure 2 As shown, the polarity-free correction and displacement measurement device of the present invention includes a plurality of sensors 10, each of which comprises: a housing 300 having an internal space; a core 100 formed to be introduced into the internal space of the housing 300; and a coil 200 wound around a portion of the outer peripheral surface of the housing 300 corresponding to the position of the core 100.

[0048] The non-polarity calibration and displacement measurement device of the present invention can generate an induced magnetic field by changing the distance between the device and an iron (Fe) object 60. The iron (Fe) object 60 has a micromagnetic field due to the magnetic properties of iron (Fe), and the movement or direction change of the iron (Fe) object 60 can generate an induced magnetic field in the sensor 10.

[0049] Specifically, core 100 has no magnetic component at all, but the proximity or separation of the magnetic field of ferrous object 60 generates an induced magnetic field in sensor 10. Furthermore, the generation of this induced magnetic field generates microcurrents and microvoltages in coil 200. In other words, with this structure, even if the magnetic flux generated by ferrous object 60 on core 100 is in the nanometer unit, or even if the magnetic field generated by ferrous object 60 has a magnetic flux density of several milligauss or less, the magnetic flux generated on core 100 can be detected whenever the position or orientation of ferrous object 60 changes.

[0050] To achieve the above functions, core 100 exhibits excellent hysteresis properties and a relatively high magnetic permeability. Specifically, core 100 is formed by mixing metal powders in a ratio of 4.6-5.2% by weight of iron (Fe), 74.3-75.6% by weight of nickel (Ni), 12.5-13% by weight of silicon (Si), 1.5-1.6% by weight of chromium (Cr), and 5.8-5.9% by weight of cobalt (Co). The metal powders are then injected at a temperature above 1300°C. Considering the permeability and impact that can affect long-distance detection, the core 100 is formed into a strip (or ribbon) shape with a thickness of 0.025 mm or less, achieving a thin and lightweight design. Furthermore, multiple thin cores 100 formed as described above can be stacked and integrated.

[0051] Here, the content of nickel component in the core 100 accounts for a major weight %, so it is important to prevent it from melting when placed at a low temperature, and the above-mentioned cobalt has Because magnetic properties (hysteresis) decrease at high temperatures, it is important that the injection temperature does not exceed 1300°C. Furthermore, since injection molding is sensitive to shock, slowing down the injection speed while rapidly cooling to 106°C / sec ensures durability of the core 100.

[0052] As mentioned above, when mixing multiple metal powders, the resulting powders are irregular. Therefore, to maintain the particles of the mixed powders in a uniform state, they are heated to a certain temperature and heat-treated until the particles are nearly dissolved, thereby providing a strong magnetic field to align the particles. Furthermore, to maintain the particles in this aligned state, the core 100 formed through the above process is placed in a magnetic field, subjected to magnetic field treatment, and then slowly cooled. This increases the magnetic hysteresis and permeability of the core 100.

[0053] The thinner the core 100 is, the better the properties are. In order to be impact-resistant and lightweight, an amorphous or Permalloy core 100 is preferably used. The amplitude of change of Permalloy metal to impact is higher than that of amorphous metal, so an amorphous (amorphous) core 100 can be used in the non-polarity correction and displacement measurement device of the present invention.

[0054] Housing 300 can be formed into a cylindrical shape with an interior space and can be made of an insulating material. Furthermore, core 100, serving as a path for the magnetic flux induced by coil 200, can be formed within the interior space of housing 300 corresponding to the position of coil 200 as described above. Furthermore, coil 200 can be formed of metal wire, such as iron wire, nickel-chromium wire, or copper wire.

[0055] like Figure 1 and Figure 2As shown, the plurality of sensors 10 are arranged in parallel, and the positions of the core 100 and the coil 200 relative to one housing 300 may be different from the positions of the core 100 and the coil 200 relative to other housings 300. Specifically, the 1-1 sensor 11 and the 1-2 sensor 12 among the plurality of sensors 10 are arranged in parallel and aligned, and the 1-1 core 111 and the 1-1 coil 211 may be formed on the right side of the 1-1 sensor 11, and the 1-2 core 112 and the 1-2 coil 212 may be formed on the left side of the 1-2 sensor 12.

[0056] like Figure 1 、 Figure 2 and Figure 5 As shown, when an object containing iron (Fe) 60 moves from the left side to the right side in the figure and approaches the sensor 10, a magnetic field change is generated instantaneously in the core 100, thereby inducing a micro voltage and a micro current in the coil 200. At this time, the portion where the N pole and S pole of the object containing iron (Fe) 60 are switched, that is, the non-polar portion ( Figure 5 When the magnetic field lines (indicated by A in FIG) pass through the 1-1 core 111, the generation of voltage and current induced by the 1-1 core 111 and the 1-1 coil 211 of the 1-1 sensor 11 may be interrupted. Here, not only the case where the magnetic field lines do not affect the 1-1 core 111 and the 1-1 coil 211 at all due to the non-polarity portion, such as Figure 5 As shown, even if the magnetic lines of force partially affect the 1-1 core 111 and the 1-1 coil 211, the generation of the induced voltage and current may be interrupted because the magnetic flux density decreases significantly when approaching the non-polarity portion.

[0057] On the other hand, at the same time, the 1-2 core 112 and the 1-2 coil 212 of the 1-2 sensor 12 are affected by the magnetic field distortion of the N pole or S pole generated by the iron (Fe) object 60, that is, by the movement of the magnetic field of the iron (Fe) object 60, so micro voltage and micro current can be induced in the 1-2 coil 212.

[0058] Furthermore, one end of the coil 200 included in one sensor 10 is connected to one end of the coil 200 included in the other sensor 10, and the other end of the coil 200 included in one sensor 10 is connected to the other end of the coil 200 included in the other sensor 10. In this way, the conductive wire of one sensor 10 and the conductive wire of the other sensor 10 can be connected with the same signal.

[0059] Specifically, when the core 100 and coil 200 (1-1 core 111 and 1-1 coil 211) of a certain sensor 10 and the core 100 and coil 200 (1-2 core 112 and 1-2 coil 212) of another sensor 10 generate an induced magnetic field, a microcurrent and a microvoltage are generated in the coil 200 of one sensor 10, thereby forming a positive electrode and a negative electrode. Similarly, a microcurrent and a microvoltage are generated in the coil 200 of the other sensor 10, thereby forming a positive electrode and a negative electrode. In this case, the positive electrode of the coil 200 of one sensor 10 can be connected to the positive electrode of the coil 200 of the other sensor 10, and the negative electrode of the coil 200 of one sensor 10 can be connected to the negative electrode of the coil 200 of the other sensor 10.

[0060] By connecting the same signals in this way, as described above, when a non-polar portion of an iron (Fe) object 60 passes through one sensor 10, even if the generation of current and voltage is interrupted in the coil 200 of one sensor 10, current and voltage are generated in the coils 200 of the other sensors 10, and the non-polarity correction and displacement measurement device can continue to operate normally.

[0061] The non-polarity correction and displacement measurement device of the present invention may further include: an impedance matching unit 20, which is connected to the respective wires connected to the plurality of coils 200 to perform impedance matching; and an amplifying unit 30, which is connected to the impedance matching unit 20 to amplify the microcurrent and microvoltage generated when the object 60 approaches the sensor 10.

[0062] The impedance matching unit 20 reduces reflections caused by impedance differences between the signals (microcurrents or microvoltages) transmitted from the two ends of each sensor 10, minimizing signal loss and maximizing signal transmission efficiency. Furthermore, the amplifier unit 30 includes an amplifier circuit for amplifying the transmitted signal. The amplifier unit 30 amplifies the signal transmitted from the impedance matching unit 20 and transmits it to the first control unit 41.

[0063] The non-polarity calibration and displacement measurement device of the present invention may further include: a first control unit 41, connected to the amplifier 30, for analyzing the waveforms of the amplified current and voltage; and a second control unit 42, connected to the first control unit 41, for analyzing position changes of the object 60 or the sensor 10. Specifically, the first control unit 41 analyzes the waveform of the amplified signal to determine whether the ferrous (Fe) object 60 or the sensor 10 itself has displaced.

[0064] The first control unit 41 can be implemented by a signal processing module such as a microcomputer or an FPGA, and can employ a software algorithm (SW algorithm). The SW algorithm determines whether the displaced object is the ferrous object 60, the sensor 10 itself, or both, based on the difference between the signal pattern information when the sensor 10 itself is displaced and the signal pattern information when the ferrous object 60 is moving.

[0065] Specifically, as described above, the sensor 10 also responds to micromagnetic fields. Therefore, when the sensor 10 itself is displaced, the sensor 10 is affected not only by changes in the magnetic field due to relative displacement with the ferrous (Fe) object 60, but also by changes in the Earth's magnetic field or the magnetic fields of other surrounding objects 60, generating a signal pattern. On the other hand, when the ferrous (Fe) object 60 is displaced, the sensor 10 is only affected by changes in the magnetic field due to relative displacement with the ferrous (Fe) object 60, resulting in different signal patterns in each case. Furthermore, based on the same principle, when both the ferrous (Fe) object 60 and the sensor 10 are displaced simultaneously, still different signal patterns can be generated.

[0066] As described above, different signal patterns are generated in each case. The signal patterns generated in each case are stored in the first control unit 41 and can be used as reference data. The signal pattern of the reference data stored in the first control unit 41 can be experimentally derived. The first control unit 41 compares the signal pattern transmitted from the amplifier 30 with the signal pattern in the reference data of the first control unit 41, analyzing similarities and other factors to determine whether the ferrous object 60 or the sensor 10 has displaced.

[0067] Second control unit 42 receives information from first control unit 41 regarding whether ferrous (Fe) object 60 has displaced or sensor 10 has displaced, as well as data regarding the signal pattern waveform, and is capable of analyzing the actual displacement path of the displaced object. Second control unit 42 can be implemented using a signal processing module such as a microcomputer or FPGA, and can utilize a software algorithm (SW algorithm).

[0068] Specifically, the signal pattern corresponding to the displacement of the ferrous (Fe) object 60, the signal pattern corresponding to the displacement of the sensor 10, or the signal pattern corresponding to the simultaneous displacement of the ferrous (Fe) object 60 and the sensor 10 can be stored in the second control unit 42 to form reference data. The signal pattern of the reference data stored in the second control unit 42 can be experimentally derived.

[0069] The second control unit 42 first determines the displacement-generating subject based on the information transmitted from the first control unit 41, selects the data type related to the position-generating subject from the reference data of the second control unit 42, and then compares and judges the waveform of the signal pattern transmitted from the first control unit 41 and the signal pattern in the reference data of the second control unit 42 to analyze the similarity, etc., thereby executing coordinate changes based on the displacement of the iron (Fe) object 60 or the coordinate changes based on the displacement of the sensor 10, etc.

[0070] Although the first control unit 41 and the second control unit 42 are connected in sequence in the embodiment of the present invention, the present invention is not limited thereto. The first control unit 41 and the second control unit 42 may be parallel or independent of each other.

[0071] The non-polarity calibration and displacement measurement device of the present invention may further include an output unit 50, which is connected to the first control unit 41 or the second control unit 42 and visually outputs the position change of the ferrous (Fe) object 60 or the sensor 10. The output unit 50 receives information from the first control unit 41 or the second control unit 42, and can indicate whether the displaced object is the ferrous (Fe) object 60 or the sensor 10, and can also display the three-dimensional coordinate changes of the position of the object using a graph or image.

[0072] Next, a polarity-free calibration and displacement measurement device according to a second embodiment of the present invention will be described.

[0073] like Figure 3 and Figure 4 As shown, the polarity-free correction and displacement measurement device of the present invention includes a sensor 10, which comprises: a housing 300 having an internal space; a plurality of cores 100 formed to be introduced into the internal space of the housing 300; and a plurality of coils 200, respectively wound on respective portions of the outer peripheral surface of the housing 300 corresponding to respective positions of the plurality of cores 100.

[0074] The nonpolarity calibration and displacement measurement device of the present invention can generate an induced magnetic field by varying the distance from an object containing iron (Fe) 60. The principle of generating the induced magnetic field and the formation of core 100 are the same as those described in the first embodiment of the nonpolarity calibration and displacement measurement device of the present invention.

[0075] like Figure 3 and Figure 4 As shown, the plurality of coils 200 are arranged in series, and one core 100 may be formed separately from the other cores 100. Specifically, the 2-1st coil 221 and the 2-2nd coil 222 may be formed in series in one housing 300, and the 2-1st core 121 and the 2-2nd core 122 may be formed accordingly.

[0076] like Figure 3 、 Figure 4 and Figure 5 As shown in FIG. 1 , when an object containing iron (Fe) 60 moves from the left side to the right side in the figure and approaches the sensor 10, a momentary change in the magnetic field is generated in the core 100, thereby inducing a micro voltage and a micro current in the coil 200. At this time, the portion where the N pole and S pole of the object containing iron (Fe) 60 are switched, that is, the portion without polarity ( Figure 5 When the magnetic field lines (indicated by A in FIG) pass through the 2-1 core 121, the generation of voltage and current induced by the 2-1 core 121 and the 2-1 coil 221 may be interrupted. Here, not only due to the non-polarity portion, but also in the case where the magnetic field lines do not affect the 2-1 core 121 and the 2-1 coil 221 at all, such as Figure 5 As shown, even if the magnetic lines of force partially affect the 2-1st core 121 and the 2-1st coil 221, the magnetic flux density is significantly reduced due to proximity to the non-polarized portion, and the generation of the induced voltage and current may be interrupted.

[0077] On the other hand, at the same time, the 2-2 core 122 and the 2-2 coil 222 are affected by the magnetic field distortion of the N pole or S pole generated by the iron (Fe) object (60), that is, by the movement of the magnetic field of the iron (Fe) object 60, so the 2-2 coil 222 can induce micro voltage and micro current.

[0078] One end of one coil 200 among the plurality of coils 200 is connected to one end of the other coils 200, and the other end of one coil 200 is connected to the other end of the other coils 200. Thus, the conductive wire of one coil 200 and the conductive wire of the other coils 200 can be connected using the same signal.

[0079] Specifically, when a certain coil 200 (the 2-1 coil 221) and another coil 200 (the 2-2 coil 222) generate an induced magnetic field, a microcurrent and a microvoltage are generated in one coil 200, forming a positive and negative pole. Similarly, a microcurrent and a microvoltage are generated in the other coil 200, forming a positive and negative pole. In this case, the positive pole of one coil 200 is connected to the positive pole of the other coil 200, and the negative pole of one coil 200 is connected to the negative pole of the other coil 200.

[0080] By connecting the same signals in this way, as described above, when a non-polar portion of an iron (Fe) object 60 passes through one sensor 10, even if the generation of current and voltage in the coil 200 of one sensor 10 is interrupted, current and voltage will be generated in the coils 200 of other sensors 10, and the non-polarity correction and displacement measurement device can continue to operate normally.

[0081] The non-polarity calibration and displacement measurement device of the present invention may further include an impedance matching unit 20 connected to the wires connected to the plurality of coils 200 to perform impedance matching; and an amplifier 30 connected to the impedance matching unit 20 to amplify the microcurrent and microvoltage generated when an object 60 approaches the sensor 10, thereby supplying power to the coils 200. The impedance matching unit 20 reduces reflections caused by the impedance difference between the signals (microcurrent or microvoltage) transmitted from the two ends of each coil 200, thereby minimizing signal loss and maximizing signal transmission efficiency. Furthermore, the amplifier 30 includes an amplifier circuit for amplifying the transmitted signal, amplifying the signal transmitted from the impedance matching unit 20 and transmitting it to the first control unit 41.

[0082] The polarity-free calibration and displacement measurement device of the present invention may further include a first control unit 41 connected to the amplifier 30 for analyzing the waveforms of the amplified current and voltage; and a second control unit 42 connected to the first control unit 41 for analyzing position changes of the object 60 or the sensor 10. Furthermore, the polarity-free calibration and displacement measurement device of the present invention may further include an output unit 50 connected to the first control unit 41 or the second control unit 42 for visually outputting position changes of the ferrous (Fe) object 60 or the sensor 10. The first control unit 41, second control unit 42, and output unit 50 included in the polarity-free calibration and displacement measurement device of the second embodiment of the present invention are identical to those included in the polarity-free calibration and displacement measurement device of the first embodiment of the present invention.

[0083] In the embodiments of the present invention, the parallel arrangement of the individual sensors 10 in the first embodiment of the nonpolarity correction and displacement measurement device and the serial arrangement of the coils 200 in one sensor 10 in the second embodiment of the nonpolarity correction and displacement measurement device are described separately. However, the nonpolarity correction and displacement measurement device of the present invention can also be configured as follows: the aforementioned single sensor 10 in which the coils 200 are arranged in series can be configured as multiple sensors 10, each of which is arranged in parallel. In this case, the positions of the coils 200 relative to each sensor 10 are different, thereby preventing the influence on the nonpolarity portion of the iron-containing object 60 as described above. Even when the nonpolarity correction and displacement measurement device of the present invention is configured as described above, the above-described structure and principles can be applied in the same manner.

[0084] Next, a polarity-free calibration and displacement measurement device according to a third embodiment of the present invention will be described. Figure 6 is a schematic diagram of a sensor according to a third embodiment of the present invention. Figure 7is a schematic diagram of a non-polarity correction and displacement measuring device based on the third embodiment of the present application. Also, Figure 8 is a schematic diagram of a non-polarity correction and displacement measuring device based on the fourth embodiment of the present application. In Figure 6 and Figure 8 , each region indicated by a double-dot chain line can be a measurable region (range) of each sensor 10 corresponding to each region.

[0085] In Figure 6 and Figure 8 , the measurable region of each sensor 10 is slightly reduced for ease of understanding, but is not limited thereto, and the measurable region of each sensor 10 can be formed larger. Also, in Figure 8 , the connection of the lead wire and the like is omitted for ease of understanding, and only the configuration of the sensor 10 is shown.

[0086] As shown in Figures 6 to 8 , the non-polarity correction and displacement measuring device of the present application includes a plurality of sensors 10, and each sensor 10 includes a housing 300 having an internal space, a core 100 formed to be introduced into the internal space of the housing 300, and a coil 200 wound around a portion of the outer peripheral surface of the housing 300 corresponding to the position of the core 100.

[0087] Here, the non-polarity correction and displacement measuring device of the present application forms an induced magnetic field by a change in distance from the object 60 containing iron (Fe). Matters related to the principle of formation of the induced magnetic field and the formation of the core 100 are the same as those described in the first embodiment of the non-polarity correction and displacement measuring device of the present application described above.

[0088] As shown in Figures 6 to 8 , the plurality of sensors 10 are respectively arranged in a radial pattern. Specifically, the 3-1 sensor 13 and the 3-2 sensor 14 among the plurality of sensors 10 can be formed in a radial pattern. (Although the remaining sensors are also formed in a radial pattern, for ease of explanation, only the 3-1 sensor 13 and the 3-2 sensor 14 are assigned symbols and described.)

[0089] As described above, in the case where the plurality of sensors 10 are respectively arranged in a radial pattern, the respective measurable regions of the plurality of sensors 10 are formed adjacent to or intersected with each other, and the detection efficiency of the object by the non-polarity correction and displacement measuring device of the present application can be significantly improved. In particular, as Figure 8As shown, when multiple sensors 10 are arranged in a three-dimensional radial pattern, the measurable area of ​​these sensors 10 can be formed into a spherical shape. This, as described above, not only improves detection efficiency but also facilitates object detection regardless of the direction in which the object moves along the xyz axes. Furthermore, when individual sensors 10 are arranged individually, it can be difficult to design an arrangement that takes into account the measurable area of ​​the sensors 10. However, when multiple sensors 10 are arranged in a radial pattern and the polarity-free calibration and displacement measurement device of the present invention is used as described above, a measurable area, such as a cylindrical or spherical shape, is formed. This makes it easier to calculate the measurable area and design the detection area for the object.

[0090] exist Figures 6 to 8 In the example, when an object containing iron (Fe) 60 moves from the left to the right in the figure, approaching the sensor 10, a momentary change in the magnetic field occurs in the core 100, which can induce a micro-voltage and micro-current in the coil 200. At this time, if the object containing iron (Fe) 60 passes through the third-first core 131, where the north and south poles of the object change, i.e., the non-polarized portion, the generation of the voltage and current induced by the third-first core 131 and the third-first coil 231 of the third-first sensor 13, may be interrupted. This is not only the case where the magnetic lines of force do not affect the third-first core 131 and the third-first coil 231 at all due to the non-polarized portion. Even if the magnetic lines of force do partially affect the third-first core 131 and the third-first coil 231, the generation of the induced voltage and current may be interrupted due to the significant decrease in magnetic flux density as the object approaches the non-polarized portion.

[0091] On the other hand, at the same time, the 3-2 core 132 and the 3-2 coil 232 of the 3-2 sensor 14 are affected by the magnetic field distortion caused by the N pole or S pole generated by the iron (Fe) object 60, that is, they are affected by the magnetic field movement of the iron (Fe) object 60, so micro voltage and micro current can be induced in the 3-2 coil 232.

[0092] Furthermore, one end of the coil 200 included in one sensor 10 is connected to one end of the coil 200 included in another sensor 10, and the other end of the coil 200 included in one sensor 10 is connected to the other end of the coil 200 included in another sensor 10. In this way, the conductive wire of one sensor 10 can be connected to the conductive wire of another sensor 10 using the same signal.

[0093] Specifically, when the core 100 and coil 200 (3-1 core 131 and 3-1 coil 231) of a certain sensor 10 and the core 100 and coil 200 (3-2 core 132 and 3-2 coil 232) of another sensor 10 generate an induced magnetic field, a microcurrent and a microvoltage are generated in the coil 200 of one sensor 10, forming a positive pole and a negative pole. Similarly, a microcurrent and a microvoltage are generated in the coil 200 of the other sensor 10, forming a positive pole and a negative pole. In this case, the positive pole of the coil 200 of one sensor 10 is connected to the positive pole of the coil 200 of the other sensor 10, and the negative pole of the coil 200 of one sensor 10 is connected to the negative pole of the coil 200 of the other sensor 10.

[0094] By connecting the same signals in this manner, as described above, when a non-polar portion of an iron (Fe) object 60 passes through one sensor 10, even if the generation of current and voltage in the coil 200 of one sensor 10 is interrupted, current and voltage are still generated in the coils 200 of the other sensors 10, and the non-polarity correction and displacement measurement device can continue to operate normally.

[0095] The non-polarity calibration and displacement measurement device of the present invention may further include an impedance matching unit 20 connected to the wires connected to the plurality of coils 200 to perform impedance matching; and an amplifier 30 connected to the impedance matching unit 20 to amplify the microcurrent and microvoltage generated when an object 60 approaches the sensor 10, thereby supplying power to the coils 200. The impedance matching unit 20 reduces reflections caused by the impedance difference between the signals (microcurrent or microvoltage) transmitted from the two ends of each coil 200, thereby minimizing signal loss and maximizing signal transmission efficiency. Furthermore, the amplifier 30 includes an amplifier circuit for amplifying the transmitted signal, thereby amplifying the signal transmitted from the impedance matching unit 20 and transmitting it to the first control unit 41.

[0096] The polarity-free calibration and displacement measurement device of the present invention may further include a first control unit 41 connected to the amplifier 30 for analyzing the waveforms of the amplified current and voltage; and a second control unit 42 connected to the first control unit 41 for analyzing position changes of the object 60 or the sensor 10. Furthermore, the polarity-free calibration and displacement measurement device of the present invention may further include an output unit 50 connected to the first control unit 41 or the second control unit 42 for visually outputting position changes of the iron (Fe) object 60 or the sensor 10. The first control unit 41, second control unit 42, and output unit 50 included in the polarity-free calibration and displacement measurement device of the third embodiment of the present invention are identical to those included in the polarity-free calibration and displacement measurement device of the first embodiment of the present invention.

[0097] Figure 9 and Figure 10 : is a graph showing a signal pattern when an object passes through the sensor according to the first embodiment of the present invention. Specifically, Figure 9 (a) is a diagram showing a single sensor 10 according to the first embodiment of the present invention, with the longitudinal axis of the sensor 10 being in a vertical direction relative to the ground. Figure 9 (b) is a diagram showing a case where the sensors 10 according to the first embodiment of the present invention are arranged in parallel and the longitudinal axis of the sensors 10 is in a vertical direction relative to the ground. Figure 10 (a) is a diagram showing a single sensor 10 according to the first embodiment of the present invention, with the longitudinal axis of the sensor 10 being in a horizontal direction relative to the ground. Figure 10 (b) is a graph showing a case where the sensors 10 according to the first embodiment of the present invention are arranged in parallel and the longitudinal axes of the sensors 10 are in a horizontal direction relative to the ground.

[0098] like Figure 9 and Figure 10 As shown, it was confirmed that, when the non-polarity calibration and displacement measurement device of the present invention is used, object 60 can be easily detected using the non-polarity calibration and displacement measurement device of the present invention, regardless of whether the longitudinal axis of sensor 10 is oriented vertically or horizontally relative to the ground. Furthermore, a comparison between the use of a single sensor 10 and the use of multiple sensors 10 arranged in parallel shows that, when the non-polarity calibration and displacement measurement device of the present invention is used, displacement of the iron-containing object 60 can be measured normally and continuously, regardless of the non-polarity portion of the iron-containing object 60.

[0099] The above-described structure enables measurement of changes in the micromagnetic field and magnetic flux of a ferrous object 60, enabling the position and displacement of the ferrous object 60 to be measured with ultra-low power. Furthermore, as described above, even when the magnetic field of the object 60 weakens, i.e., in a non-polarized region, the magnetic field of the ferrous object 60 can be detected by other adjacent sensors 10 or coils 200, allowing the non-polarized calibration and displacement measurement device of the present invention to operate normally and continuously. Furthermore, as described above, other influences such as the orientation of the sensor 10 relative to the ground can be minimized, enabling detection and measurement regardless of the configuration of the non-polarized calibration and displacement measurement device of the present invention. Furthermore, as described above, the non-polarized calibration and displacement measurement device of the present invention can detect changes in the micromagnetic field and magnetic flux of a ferrous object and maintain consistent performance regardless of the influence of air, soil, water, and the like.

[0100] The above description of the present invention is for illustration only. Those skilled in the art will understand that it can be easily modified into other specific embodiments without changing the technical concept or essential technical features of the present invention. Therefore, it should be understood that the embodiments described above are illustrative in all aspects and are not limiting. For example, each structural element described in a stand-alone manner can also be implemented in a decentralized manner, and similarly, the structural elements described in a decentralized manner can also be implemented in a combined form.

[0101] The scope of the present invention is indicated by the claims, and it should be interpreted that all changes and modifications that can be derived from the meaning and scope of the claims and the concept of equivalents are included in the scope of the present invention.

[0102] Description of Reference Numerals

[0103] 10: Sensor 11: 1-1 sensor

[0104] 12: 1st-2nd sensor 13: 3rd-1st sensor

[0105] 14: 3-2 sensor 20: Impedance matching unit

[0106] 30: Amplification unit 41: First control unit

[0107] 42: Second control unit 50: Output unit

[0108] 60: Object 100: Core

[0109] 111: 1st-1st core 112: 1st-2nd core

[0110] 121: 2nd-1st core 122: 2nd-2nd core

[0111] 131: 3rd-1st core 132: 3rd-2nd core

[0112] 200: Coil 211: Coil 1-1

[0113] 212: 1st-2nd coil 221: 2nd-1st coil

[0114] 222: 2nd coil 231: 3rd coil

[0115] 232: 3-2 coil 300: housing

Claims

1. A device for non-polarity calibration and displacement measurement of an object using a search coil type sensor, characterized in that: The sensor includes a housing having an internal space; a core formed to be introduced into the internal space of the housing; and a coil wound around a portion of the outer peripheral surface of the housing corresponding to the position of the core. A plurality of the sensors are arranged in parallel. The position of the core and coil relative to one housing is different from the position of the core and coil relative to the other housing. An induced magnetic field is formed according to the change in distance from the ferrous object.

2. The device for non-polarity correction and displacement measurement of an object using a search coil type sensor according to claim 1, wherein: One end of a coil included in one sensor is connected to one end of a coil included in another sensor, and the other end of the coil included in the one sensor is connected to the other end of the coil included in the other sensor.

3. The device for non-polarity correction and displacement measurement of an object using a search coil type sensor according to claim 1, wherein: Also includes: an impedance matching unit connected to each of the conductive wires connected to the plurality of coils to perform impedance matching; as well as The amplifier is connected to the impedance matching unit and amplifies the micro-current and micro-voltage generated when the object approaches the sensor.

4. The device for non-polarity correction and displacement measurement of an object using a search coil type sensor according to claim 3, wherein: Also includes: a first control unit connected to the amplifying unit and configured to analyze the waveforms of the amplified current and voltage; as well as The second control unit is connected to the first control unit and analyzes the position change of the object or the sensor.

5. A device for non-polarity calibration and displacement measurement of an object using a search coil type sensor, characterized in that: The sensor includes a housing having an internal space; a plurality of cores formed to be introduced into the internal space of the housing; and a plurality of coils wound around respective portions of an outer peripheral surface of the housing corresponding to respective positions of the plurality of cores. The plurality of coils are arranged in series, One core is formed separately from the other cores, An induced magnetic field is formed according to the change in distance from the ferrous object.

6. The device for non-polarity correction and displacement measurement of an object using a search coil type sensor according to claim 5, wherein: One end of one coil among the plurality of coils is connected to one end of the other coils, and the other end of the one coil is connected to the other end of the other coils.

7. The device for non-polarity correction and displacement measurement of an object using a search coil type sensor according to claim 5, wherein: Also includes: an impedance matching unit connected to each of the conductive wires connected to the plurality of coils to perform impedance matching; as well as The amplifier is connected to the impedance matching unit and amplifies the micro-current and micro-voltage generated when the object approaches the sensor.

8. The device for non-polarity correction and displacement measurement of an object using a search coil type sensor according to claim 7, wherein: Also includes: a first control unit connected to the amplifying unit and configured to analyze the waveforms of the amplified current and voltage; as well as The second control unit is connected to the first control unit and analyzes the position change of the object or the sensor.

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