Multiple measurement device using a probe coil type sensor

Abstract

One embodiment of the present invention relates to the following technology: for iron-containing objects, it is possible to measure the positions of multiple objects, determine the movement paths of multiple objects, etc. A multiple measurement device using a detection coil type sensor according to one embodiment of the present invention is characterized in that it includes: a sensor module including at least one sensor, the sensor having a housing, a core and a coil, the housing having an internal space, the core being formed to be introduced into the internal space of the housing, and the coil being wound around a portion of the outer peripheral surface of the housing corresponding to the position of the core; an impedance matching unit connected to the sensor module to perform impedance matching; and an amplifier connected to the impedance matching unit to amplify the microcurrent and microvoltage generated when an object approaches the sensor.

Description

Technical Field

[0001] The present invention relates to a multiple measurement device using a search coil type sensor, and more specifically, to a technology that can measure the positions of multiple objects containing iron, determine the movement paths of each of the multiple objects, etc. Background Art

[0002] Magnetic sensors use a variety of technologies such as 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, various IoT application products have emerged, and the scope of application of magnetic sensor technology in daily life is also expanding.

[0003] As a result, domestic companies such as Samsung Electronics and foreign companies such as Honeywell are studying the possibility of further miniaturizing magnetic sensors in the form of chips, and are conducting various research and development activities to increase detection sensitivity and range and reduce detection errors.

[0004] In the Republic of Korea registered patent No. 10-0867375 (invention title: device and method for measuring position and direction information of a moving body using three magnetic sensors), a method is disclosed, comprising: a setting step, in which two magnetic sensors corresponding to the surfaces formed by the x and y axes are set on the moving body, and a magnetic sensor corresponding to the z axis is set on the moving body; a storage step, in which the moving body measures the earth's magnetic field corresponding to the above-mentioned x, y, and z axes, respectively, and stores the information value of the reference magnetic field in an internal memory; a judgment step, in which the moving body measures the magnitude of the magnetic field of the x, y, and z axes while moving, and then judges 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 the error range of the magnetic sensor; and an updating step, in which, when it is judged in the judgment step that the absolute value of the difference between the measured value of the z axis and the reference value is less than the error range of the sensor, the direction information value of the moving body is updated using the x and y axis magnetic field measurement values.

[0005] Prior art literature:

[0006] Patent document: Korean Patent Registration No. 10-0867375 Summary of the invention

[0007] Technical issues to be solved

[0008] The object of the present invention is to detect the position, displacement, etc. of an object by 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, an object of the present invention is to prevent detection delay caused by a range where the magnetic field is temporarily weakened (polarity-free range) when the polarity of the sensor changes as the ferrous object is displaced.

[0010] Furthermore, an object of the present invention is to enable position measurement and the like for a plurality of objects and to enable determination of movement paths and the like of each of the plurality of objects.

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

[0012] Means used to solve problems

[0013] The structure of the present invention for achieving the above-mentioned purpose is characterized in that it includes: a sensor module including at least one sensor, the sensor having a shell, a core and a coil, the shell having an internal space, the core being formed to be introduced into the internal space of the shell, and the coil being wound around a portion of the outer peripheral surface of the shell corresponding to the position of the core; an impedance matching unit connected to the sensor module to perform impedance matching; and an amplifier connected to the impedance matching unit to amplify a microcurrent and a microvoltage generated when the object approaches the sensor module, the sensor module forms an induced magnetic field by changing the distance between the sensor module and the iron (Fe)-containing object, and is capable of measuring the movement of at least one of the objects.

[0014] In an embodiment of the present invention, the sensor module is formed in plurality, and the impedance matching unit and the amplifying unit may be connected to each of the plurality of sensor modules, respectively.

[0015] In one embodiment of the present invention, it further includes: a first control unit connected to the plurality of amplifying units for analyzing the waveforms of the amplified current and voltage; and a second control unit connected to the first control unit for analyzing the movement of the object.

[0016] In one embodiment of the present invention, the second control unit is capable of identifying the object having a magnetic flux density within a predetermined magnetic flux density range.

[0017] In one embodiment of the present invention, the device further includes an output unit connected to the second control unit to visually output the position change of the object.

[0018] In one embodiment of the present invention, the plurality of sensors are arranged in parallel or radially.

[0019] In one embodiment of the present invention, the plurality of coils included in the sensor are arranged in series.

[0020] 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.

[0021] Effects of the Invention

[0022] The present invention based on the above-mentioned structure has the following effects: it is possible to detect the change of the micromagnetic field and magnetic flux of the ferrous object, and it is possible to detect the position and displacement of the ferrous object with ultra-low power.

[0023] Moreover, the effect of the present invention is that as the iron-containing object moves and the polarity changes relative to the sensor, even if there is a range where the magnetic field temporarily weakens (non-polarity range), the magnetic field of the iron-containing object can be detected by other adjacent sensors or coils, and the device can operate normally and continuously.

[0024] Another effect of the present invention is that detection and measurement can be performed regardless of the arrangement of the sensor or sensor module.

[0025] Furthermore, the present invention has the effect that the positions of a plurality of objects can be measured using a plurality of sensor modules, thereby making it possible to determine the movement paths of the plurality of objects.

[0026] Furthermore, the present invention has the effect that it is possible to detect changes in the micromagnetic field and magnetic flux of an iron-containing object, so that the same performance can be exerted without being affected by air, soil, water, etc.

[0027] It should be understood that the effects of the present invention are not limited to the above-mentioned effects, but include all effects that can be expected from the inventive structure described in the specification or claims of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 and Figure 2 This is a schematic diagram of a multiple measurement device according to an embodiment of the present invention.

[0029] Figure 3 This is a schematic diagram of a sensor according to a first embodiment of the present invention.

[0030] Figure 4 This is a schematic diagram of a sensor module according to a first embodiment of the present invention.

[0031] Figure 5 This is a schematic diagram of a sensor according to a second embodiment of the present invention.

[0032] Figure 6 This is a schematic diagram of a sensor module according to a second embodiment of the present invention.

[0033] Figure 7 is a schematic diagram of the magnetic field region of the sensor according to various embodiments.

[0034] Figure 8 This is a schematic diagram of a sensor according to a third embodiment of the present invention.

[0035] Fig. 9 This is a schematic diagram of a sensor module according to a third embodiment of the present invention.

[0036] Fig.10 This is a schematic diagram of a sensor module according to a fourth embodiment of the present invention.

[0037] Fig.11 and Fig.12 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

[0038] The most preferred embodiment of the present invention includes: a sensor module including at least one sensor, the sensor having a shell, a core and a coil, the shell having an internal space, the core being formed to be introduced into the internal space of the shell, and the coil being wound around a portion of the outer peripheral surface of the shell corresponding to the position of the core; an impedance matching unit connected to the sensor module to perform impedance matching; and an amplifier connected to the impedance matching unit to amplify the microcurrent and microvoltage generated when the object approaches the sensor module, the sensor module forms an induced magnetic field by changing the distance between the sensor module and the iron (Fe)-containing object, and is capable of measuring the movement of at least one of the objects.

[0039] 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. Moreover, in the accompanying drawings, parts not related to the description are omitted for the convenience of clearly describing the present invention, and similar parts are given similar reference numerals throughout the specification.

[0040] Throughout the specification, when it is stated that a certain part is "connected (connected, in contact with, combined)" to another part, it includes not only the case of "direct connection" but also the case of "indirect connection" via other components. In addition, when it is stated that a certain part "includes" a certain structural element, unless otherwise specified, it does not exclude other structural elements, but may also include other structural elements.

[0041] 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 the situation where the singular expression clearly indicates different meanings in the context, it also includes the plural situation. It should be understood that in this specification, the terms such as "including" or "having" are intended to indicate the existence of the features, numbers, steps, actions, structural elements, components 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, components or combinations thereof.

[0042] Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

[0043] Figure 1 and Figure 2 This is a schematic diagram of a multiple measurement device according to an embodiment of the present invention. Figure 3 This is a schematic diagram of a sensor according to a first embodiment of the present invention. Figure 4 This is a schematic diagram of a sensor module according to a first embodiment of the present invention. Figure 5 This is a schematic diagram of a sensor according to a second embodiment of the present invention. Figure 6 This is a schematic diagram of a sensor module according to a second embodiment of the present invention. Figure 7 is a schematic diagram of the magnetic field area of ​​the sensor based on each embodiment. Figure 7 (a) is a diagram showing a situation where an object containing iron (Fe) moves relative to the sensor module according to the first embodiment of the present invention, Figure 7 (b) is a diagram showing the movement of an object containing iron (Fe) relative to the sensor module based on the second embodiment of the present invention. The direction can be set based on the up, down, left, and right of each figure. The same applies to the following. In the drawings of the present invention, for convenience, the N pole and S pole are shown for the object containing iron (Fe), but it does not mean that the object itself is a magnet or an electromagnet. Figure 4 , Figure 6 and Fig. 9 In the figure, the first control unit and the second control unit are connected respectively, but this only uses arrows to indicate signal transmission, and does not mean that each sensor module is independently formed with the first control unit and the second control unit.

[0044] like Figures 1 to 3As shown, the complex measurement device of the present invention includes: a sensor module, which includes at least one sensor 10, the sensor 10 has a shell 300, a core 100 and a coil 200, the shell 300 has an internal space, the core 100 is formed to be introduced into the internal space of the shell 300, and the coil 200 is wound on a portion of the outer peripheral surface of the shell 300 corresponding to the position of the core 100; an impedance matching unit 20, which is connected to the sensor module and performs impedance matching; and an amplifier 30, which is connected to the impedance matching unit 20 and amplifies the micro-current and micro-voltage generated when an object approaches the sensor module.

[0045] The sensor module can form an induced magnetic field by changing the distance between the sensor module and the iron (Fe) object. That is, in the sensor 10, an induced magnetic field can be formed by changing the distance between the sensor module and the iron (Fe) object. The iron (Fe) object has a micromagnetic field due to the magnetic property of iron (Fe). The movement or direction change of the iron (Fe) object can also form an induced magnetic field in the sensor 10.

[0046] Specifically, the core 100 has no magnetic component at all, and the approach or distance of the magnetic field possessed by the iron-containing object can form an induced magnetic field in the sensor 10. Moreover, by generating the induced magnetic field as described above, a micro-current and a micro-voltage can be formed in the coil 200. That is, through the above-mentioned structure, even if the magnetic flux generated by the iron (Fe) object to the core 100 is in nanometer units, or the magnetic field generated by the iron (Fe) object has a magnetic flux density of several mm Gauss or less, every time the position or direction of the iron (Fe) object 60 changes, the magnetic flux generated to the core 100 can be detected.

[0047] In order to achieve the above functions, the core 100 has good hysteresis characteristics and can have a relatively high magnetic permeability. Specifically, in order to form the core 100, the metal powders are mixed at a ratio of 4.6-5.2 wt% of iron (Fe), 74.3-75.6 wt% of nickel (Ni), 12.5-13 wt% of silicon (Si), 1.5-1.6 wt% of chromium (Cr) and 5.8-5.9 wt% of cobalt (Co), and are injected at a temperature above 1300°C. Considering the magnetic permeability and impact that affect long-distance detection, it is formed into a strip (or belt) shape with a thickness of less than 0.025 mm, which can achieve thinness and lightness. In addition, multiple thin cores 100 formed as described above can be overlapped and integrated.

[0048] 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 Since the magnetic properties (hysteresis) decrease at a temperature of 100°C, it is important that the injection temperature does not rise above 1300°C. In addition, since injection is sensitive to shock, the core 100 can be made durable by slowing down the injection speed and rapidly cooling to 106°C / sec.

[0049] As described above, when a plurality of metal powders are mixed, the state of the mixed powders is irregular, so in order to keep the particles of the mixed powders in a state of being arranged in a certain direction, they are heated to a certain temperature and heat-treated until the particles are about to dissolve to provide a strong magnetic field, so that the particles can be arranged in order. Furthermore, in order to keep the particles in an orderly state, the core 100 formed by the above process is placed in a magnetic field, subjected to magnetic field treatment, and slowly cooled. As a result, the hysteresis and magnetic permeability of the core 100 can be increased.

[0050] 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 complex measurement device of the present invention.

[0051] The housing 300 may be formed in a cylindrical shape with an internal space, and the housing 300 may be formed of an insulating material. Furthermore, the core 100 may be formed in the internal space of the housing 300 corresponding to the position of the coil 200 as a passage for the magnetic flux induced by the coil 200 as described above. Furthermore, the coil 200 may be formed of a metal wire such as an iron wire, a nickel-chromium wire, or a copper wire.

[0052] The complex measurement device of the present invention can measure the movement of at least one object 60. Moreover, it can not only measure the position, direction, speed, etc. related to the movement of the object 60, but also the number of objects 60 and the magnetic flux density. Moreover, a plurality of sensor modules are formed for this purpose, and the impedance matching unit 20 and the amplifier unit 30 can be connected to the plurality of sensor modules respectively. Moreover, the complex measurement device of the present invention also includes: a first control unit 41, which is connected to the plurality of amplifiers 30 and analyzes the waveform (signal pattern) of the amplified current and voltage; and a second control unit 42, which is connected to the first control unit 41 and analyzes the movement of the object.

[0053] In the embodiment of the present invention, the sensor modules (first to third sensor modules) are arranged at regular intervals, but the present invention is not limited thereto, and the arrangement of the sensor modules may be changed according to the purpose of the multiple measurement device of the present invention.

[0054] like Figure 1 and Figure 2 As shown, the multiple measurement device of the present invention can utilize multiple objects The respective positions, directions and speeds of objects can be used to analyze the movement path and speed, and the relative motion between an object and other objects can also be analyzed.

[0055] As a specific example, Figure 1 As shown, the first object 61 can move from the left side to the right side in the figure, toward the first sensor module 1 and the second sensor module 2, the second object 62 can move toward the upper side of the second sensor module 2 based on the figure, and the third object 63 can move toward the first sensor module 1 and the third sensor module 3. Here, the magnetic flux density of the first object 61 can be 5×10 -17 T (Tesla), the speed can be 4 km / h (the walking speed of ordinary people), and the magnetic flux density of the second object 62 can be 3×10 -17 T (Tesla), the speed can be 4 km / h, and the magnetic flux density of the third object 63 can be 5×10 -17 T (Tesla), the speed can be 6km / h.

[0056] Moreover, if Figure 2 As shown, the fourth object 64 can move from the second sensor module 2 toward the first sensor module 1, and the fifth object 65 can move toward the first sensor module 1 and the third sensor module 3. Here, the magnetic flux density of the fourth object 64 can be 5×10 -17 T (Tesla), the speed can be 4 km / h, and the magnetic flux density of the fifth object 65 can be 5×10 -17 T (Tesla), the speed can be 6km / h.

[0057] First, in the analysis of the number of objects 60, when the first object 61, the second object 62, and the third object 63 move as described above, in the first sensor module 1, the second sensor module 2, and the third sensor module 3, signals are generated in the sensors by the movement of each object, and each sensor signal is transmitted to the first control unit 41 via the impedance matching unit 20 and the amplifier 30 connected to each sensor module as described above. The first control unit 41 analyzes such a plurality of signal patterns, thereby being able to determine the number of objects 60 passing near each sensor module. Data for each signal pattern based on the magnetic flux density and speed of each object 60 and a composite pattern when two or more signal patterns overlap as described above are stored in the first control unit 41, and the first control unit 41 analyzes each signal pattern, derives the number of signal patterns inherent to the object 60, and thereby being able to analyze the number of objects 60 passing through the multiple measurement device of the present invention. Here, data for each signal pattern or composite pattern can be experimentally stored. However, as a signal separation technology for determining the object 60, other existing technologies can also be used. The above-mentioned principle is also applicable to the case where the fourth object 64 and the fifth object 65 move. As a result, each object 60 can be identified through the analysis by the first control unit 41 as described above, and the signal pattern corresponding to each object 60 can be separated.

[0058] Furthermore, in the analysis of the moving path, moving speed, and magnetic flux density of each object 60, each object 60 is determined by the signal pattern analysis of the first control unit 41, and the signal pattern for each object 60 can be transmitted to the second control unit 42. Furthermore, the second control unit 42 can analyze each signal pattern and analyze the moving path and moving speed of each object 60.

[0059] Specifically, Figure 1 As shown, when the first object 61, the second object 62, and the third object 63 are moving linearly in one direction (reference direction), each object 60 is determined as described above, and the signal pattern for each object 60 is separated by the first control unit 41 and transmitted to the second control unit 42. The second control unit 42 analyzes that each object 60 forms a signal pattern of a certain strength for each sensor module, thereby being able to determine that the first object 61, the second object 62, and the third object 63 are moving in the same direction, and the magnetic flux density and moving speed of each object 60 can be determined by the signal pattern of each object 60. Here, as with the first control unit 41, the data for each signal pattern based on the magnetic flux density and speed of each object 60 is stored in the second control unit 42, and the second control unit 42 can use the stored data.

[0060] Moreover, if Figure 2As shown, when the fourth object 64 and the fifth object 65 move in different directions, the objects 60 are determined as described above, and the signal patterns for the objects 60 are separated by the first control unit 41 and transmitted to the second control unit 42. The second control unit 42 analyzes the phenomenon that the intensity of the signal pattern of the fourth object 64 gradually increases in the first sensor module 1 and gradually decreases in the second sensor module 2, and the pattern of the intensity change as described above, and can determine that the fourth object 64 moves in a manner that forms a certain angle relative to the reference direction (the direction in which the fifth object 65 moves), and can determine the magnetic flux density and the moving speed through the signal pattern of the fourth object 64. The analysis of the movement of the fifth object 65 can be the same as the analysis of the first object 61 and the like as described above.

[0061] The second control unit 42 can determine the object 60 having a magnetic flux density within a predetermined magnetic flux density range. In other words, the second control unit 42 can determine whether a specific object 60 passes through the multiple measurement device of the present invention. Specifically, as described above, the first control unit 41 determines each object, separates the signal pattern of each object, and transmits it to the second control unit 42. The second control unit 42 analyzes the signal pattern of the transmitted object 60 to determine whether the magnetic flux density of the object is included in the predetermined magnetic flux density range. The content of iron components in each object is different, and the magnetic flux density is different. The magnetic flux density of a specific object classification can be included in the predetermined magnetic flux density range, so the second control unit 42 can use the magnetic flux density of a certain object 60 to determine whether the object belongs to the specific object classification. Specifically, in the case of guns, through the forging process, it can contain a relatively high density of iron components to have a relatively large magnetic flux density. As a result, the magnetic flux density of guns can form a predetermined magnetic flux density range, and the second control unit 42 can determine that the object belongs to the gun class when the magnetic flux density of an object is included in the magnetic flux density range of guns.

[0062] The multiple measurement device of the present invention may further include an output unit 50, which is connected to the second control unit 42 and visually outputs the position change of the object. The output unit 50 receives information from the second control unit 42, and can represent the three-dimensional coordinate change of the moving path of the object 60 with a coordinate graph or image, and can also display numerical information such as the moving speed and magnetic flux density of the object 60 on the screen.

[0063] Next, the arrangement of the sensor 10 included in the sensor module will be described. Figure 8 is a schematic diagram of a sensor according to a third embodiment of the present invention, Fig. 9 This is a schematic diagram of a sensor module according to a third embodiment of the present invention. Fig.10 This is a schematic diagram of a sensor module according to a fourth embodiment of the present invention.

[0064] like Figure 3 , Figure 4 , Figure 7 to Figure 10 As shown, the plurality of sensors 10 can be arranged in parallel or radially. First, a case where the plurality of sensors 10 are arranged in parallel will be described.

[0065] like Figure 3 and Figure 4 As 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 in an aligned manner, 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.

[0066] like Figure 3 , Figure 4 and Figure 7 As shown in FIG. 1 , when the iron (Fe) object 60 moves from the left side to the right side in the figure and approaches the sensor 10, a magnetic field change is instantly 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 the S pole of the iron (Fe) object 60 are switched, that is, the non-polar portion ( Figure 7 When the magnetic field lines (indicated by A in FIG. 1 ) 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 by virtue of the non-polarity portion, such as Figure 7 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 is significantly reduced when approaching the non-polarity portion.

[0067] 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.

[0068] Furthermore, one end of the coil 200 of one sensor 10 is connected to one end of the coil 200 of the other sensor 10, and the other end of the coil 200 of one sensor 10 is connected to the other end of the coil 200 of the other sensor 10. Thus, the wire of one sensor 10 can be connected to the wire of the other sensor 10 with the same signal.

[0069] 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 other sensors 10 generate an induced magnetic field, a micro-current and a micro-voltage are generated in the coil 200 of one sensor 10, thereby forming a positive pole and a negative pole, and a micro-current and a micro-voltage are also generated in the coil 200 of other sensors 10, thereby forming a positive pole and a negative pole. At this time, the positive pole of the coil 200 of one sensor 10 can be connected to the positive pole of the coil 200 of other sensors 10, and the negative pole of the coil 200 of one sensor 10 can be connected to the negative pole of the coil 200 of other sensors 10.

[0070] By connecting the same signal in this way, as described above, when a non-polar portion of an iron (Fe)-containing object 60 passes through a sensor 10, even if the generation of current and voltage in a coil 200 of one sensor 10 is interrupted, current and voltage are generated in the coils 200 of other sensors 10, and the sensor module can continue to operate normally.

[0071] The impedance matching unit is connected to the wires connected to the plurality of coils 200 to perform impedance matching. The impedance matching unit 20 reduces the reflection caused by the impedance difference between the signals (microcurrent or microvoltage) transmitted from the two ends of each sensor 10, reduces the signal loss, and thus can maximize the signal transmission efficiency. In addition, the amplifier 30 includes an amplifier circuit for amplifying the transmitted signal, and amplifies the signal transmitted from the impedance matching unit 20 and transmits it to the first control unit 41.

[0072] The first control unit 41 analyzes the waveform of the amplified signal and can determine whether the object 60 containing iron (Fe) has been displaced or whether the sensor module itself has been displaced.

[0073] The first control unit 41 can be implemented by a signal processing module such as a microcomputer or FPGA, and a software algorithm (SW algorithm) can be applied. The SW algorithm determines whether the displaced subject is the iron (Fe) object 60 or the sensor 10 itself included in the sensor module, or both, based on the difference between the information of the signal pattern when the sensor 10 itself is displaced and the information of the signal pattern when the iron (Fe) object 60 moves.

[0074] Specifically, as described above, the sensor 10 also reacts to micromagnetic fields, so when the sensor 10 itself is displaced, the sensor 10 is affected by changes in the earth's magnetic field or the magnetic field of other surrounding objects 60 in addition to changes in the magnetic field caused by the relative displacement with the iron (Fe) object 60, and forms a signal pattern. On the other hand, when the iron (Fe) object 60 is displaced, the sensor 10 is only affected by changes in the magnetic field caused by the relative displacement with the iron (Fe) object 60, and different signal patterns can be formed in each case. Moreover, based on the same principle, when the iron (Fe) object 60 and the sensor 10 are displaced at the same time, other different signal patterns can be formed.

[0075] As described above, different signal patterns are formed in each case, and the signal patterns formed in each case are stored in the first control unit 41, which can form reference data. Here, the signal pattern of the reference data stored in the first control unit 41 can be experimentally derived. The first control unit 41 compares and determines the signal pattern transmitted from the amplifier 30 with the signal pattern in the reference data of the first control unit 41 to analyze the similarity, etc., so as to determine whether the iron (Fe) object 60 is displaced or whether the sensor module is displaced.

[0076] The second control unit 42 receives information for determining whether the iron (Fe) object 60 is displaced or whether the sensor module is displaced and data on the signal pattern waveform from the first control unit 41, and can analyze the actual displacement path of the displaced body. The second control unit 42 can be implemented by a signal processing module such as a microcomputer or FPGA, and can apply a software algorithm (SW algorithm).

[0077] Specifically, the signal pattern for displacement of the iron (Fe) object 60, the signal pattern for displacement of the sensor module, or the signal pattern for simultaneous displacement of the iron (Fe) object 60 and the sensor module can be stored in the second control unit 42 to form reference data. Here, the signal pattern of the reference data stored in the second control unit 42 can be experimentally derived.

[0078] The second control unit 42 first determines the displacement subject based on the information transmitted from the first control unit 41, selects the data type related to the position occurrence 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 coordinate changes based on the displacement of the sensor module, etc.

[0079] 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, and the first control unit 41 and the second control unit 42 may be parallel or independent structures.

[0080] That is, as described above, in addition to separating the signal pattern to identify the object 60, the first control unit can also determine whether the object 60 is displaced or whether the sensor module is displaced. The second control unit 42 can analyze the moving path and moving speed of the object while analyzing the moving path of the sensor module.

[0081] Next, a case where a plurality of sensors 10 are arranged radially will be described. Figure 8 and Fig.10 In FIG. 1 , each area indicated by a two-dot chain line may be a measurable area (range) of each sensor 10 corresponding to the respective area.

[0082] exist Figure 8 and Fig.10 In order to facilitate understanding, the measurable area of ​​each sensor 10 is slightly reduced, but it is not limited to this, and the measurable area of ​​each sensor 10 can be formed larger. Fig.10 In the figure, for ease of understanding, the connection of wires and the like are omitted, and only the configuration of the sensor 10 is shown.

[0083] like Figure 8 to Figure 10 As shown, the plurality of sensors 10 are arranged in radial shapes. Specifically, the 3-1st sensor 13 and the 3-2nd sensor 14 of the plurality of sensors 10 can be formed in radial shapes. (Although there are other sensors formed in radial shapes, for the sake of convenience, only the 3-1st sensor 13 and the 3-2nd sensor 14 are given symbols and described.)

[0084] As described above, when the plurality of sensors 10 are arranged radially, the respective measurable areas of the plurality of sensors 10 are adjacent to or intersecting each other, which can significantly improve the detection efficiency of the object detected by the multiple measurement device of the present invention. Fig.10As shown, when the plurality of sensors 10 are respectively arranged in a three-dimensional radial shape, the measurable area based on the plurality of sensors 10 can be formed into a spherical shape, thereby, as described above, the following effects can be obtained: not only the detection efficiency is increased, but also the object can be easily detected regardless of which direction the object moves in the xyz axis. In addition, when the individual sensors 10 are arranged separately, it may not be easy to design the arrangement considering the measurable area of ​​the sensor 10, but when the plurality of sensors 10 are arranged in a radial shape and the multiple measurement device of the present invention formed as described above is used, the measurable area such as a cylindrical or spherical shape is formed, so that the measurable area can be easily calculated, and the detection area of ​​the object can be easily designed.

[0085] exist Figure 8 to Figure 10 In the case where the iron (Fe) object 60 moves from the left side to the right side in the figure and approaches the sensor 10, a magnetic field change is instantly generated in the core 100, thereby inducing a micro voltage and a micro current in the coil 200. At this time, when the portion where the N pole and the S pole of the iron (Fe) object 60 are switched, that is, the non-polar portion passes through the 3-1 core 131, the generation of the voltage and current induced by the 3-1 core 131 and the 3-1 coil 231 of the 3-1 sensor 13 may be interrupted. Here, not only the case where the magnetic force lines do not have any influence on the 3-1 core 131 and the 3-1 coil 231 due to the non-polar portion, even if the magnetic force lines partially affect the 3-1 core 131 and the 3-1 coil 231, the generation of the induced voltage and current may be interrupted because the magnetic flux density is significantly reduced when approaching the non-polar portion.

[0086] 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 movement of the magnetic field of the iron (Fe) object 60, so micro voltage and micro current can be induced in the 3-2 coil 232.

[0087] Furthermore, one end of the coil 200 of one sensor 10 is connected to one end of the coil 200 of the other sensor 10, and the other end of the coil 200 of one sensor 10 is connected to the other end of the coil 200 of the other sensor 10. Thus, the wire of one sensor 10 can be connected to the wire of the other sensor 10 with the same signal.

[0088] 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 other sensors 10 generate an induced magnetic field, a micro-current and a micro-voltage are generated in the coil 200 of one sensor 10 to form a positive pole and a negative pole, and a micro-current and a micro-voltage are also generated in the coil 200 of the other sensor 10 to form a positive pole and a negative pole. At this time, 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.

[0089] By connecting the same signal, as described above, when a non-polar part of an iron (Fe) object 60 passes through a 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 other sensors 10, and the sensor module can continue to operate normally.

[0090] The remaining matters concerning the impedance matching unit 20 , the amplifier 30 , the first control unit 41 , and the second control unit 42 are the same as those concerning the impedance matching unit 20 , the amplifier 30 , the first control unit 41 , and the second control unit 42 in the case where the plurality of sensors 10 are arranged in parallel.

[0091] like Figure 5 and Figure 6 As shown, the plurality of coils 200 provided in the sensor 10 are arranged in series. That is, in the sensor 10 provided in the sensor module, the plurality of coils 200 are arranged in series, and one core 100 can be formed separately from the other cores 100. Specifically, in one housing 300, the 2-1st coil 221 and the 12-2nd coil 222 are formed in series, and the 2-1st core 121 and the 12-2nd core 122 are formed correspondingly. Here, in the sensor module, at least one or more sensors 10 can be formed.

[0092] like Figure 5 , Figure 6 and Figure 7 As shown in FIG. 1 , when the iron (Fe) object 60 moves from the left side to the right side in the figure in a manner close to the sensor 10, a magnetic field change is instantly generated in the core 100, thereby inducing a micro voltage and a micro current in the coil 200. At this time, at the part where the N pole and the S pole of the iron (Fe) object 60 are switched, that is, the non-polar part ( Figure 7When the magnetic field lines (indicated by A in FIG. 1 ) pass through the 2-1 core 121, the generation of the voltage and current induced by the 2-1 core 121 and the 2-1 coil 221 may be interrupted. Here, by virtue of the non-polarity portion, the magnetic field lines will not affect the 2-1 core 121 and the 2-1 coil 221 at all. Figure 7 As shown, even if the magnetic lines of force partially affect the 2-1st core 121 and the 2-1st coil 221, the generation of the induced voltage and current may be interrupted because the magnetic flux density is significantly reduced when approaching the non-polarity portion.

[0093] 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 based on the N pole or S pole generated by the iron (Fe) object 60, that is, they are affected by the movement of the magnetic field of the iron (Fe) object 60, so micro voltage and micro current can be induced in the 2-2 coil 222.

[0094] 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 according to the same signal.

[0095] Specifically, when a certain coil 200 (the 2-1 coil 221) and other coils 200 (the 2-2 coil 222) generate an induced magnetic field, a micro-current and a micro-voltage are generated in one coil 200 to form a positive pole and a negative pole, and a micro-current and a micro-voltage are also generated in other coils 200 to form a positive pole and a negative pole. At this time, the positive pole of one coil 200 is connected to the positive pole of the other coils 200, and the negative pole of one coil 200 is connected to the negative pole of the other coils 200.

[0096] By connecting the same signal, as described above, when a non-polar part of an iron (Fe) object 60 passes through a 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 other sensors 10, and the sensor module can continue to operate normally.

[0097] The remaining matters concerning the impedance matching unit, the amplifier, the first control unit, and the second control unit are also the same as those concerning the impedance matching unit, the amplifier, the first control unit, and the second control unit in the case where the plurality of sensors are arranged in parallel.

[0098] In the embodiment of the present invention, the matters when the sensors 10 are arranged in parallel in the sensor module and the matters when the coils 200 are arranged in series in the sensor 10 are described separately, but the sensor 10 in which the coils 200 are arranged in series in one sensor 10 may be formed in multiple numbers and the sensors 10 may be arranged in parallel. In this case, the positions of the coils 200 relative to the sensors 10 are different from each other, and as described above, the sensor module can be formed in a manner to prevent the influence of the non-polar part of the iron (Fe) object 60. In the above case, the above structure and principle can also be applied.

[0099] Fig.11 and Fig.12 : is a graph showing a signal pattern when an object passes through the sensor according to the first embodiment of the present invention. Specifically, Fig.11 (a) is a diagram showing a single sensor 10 according to the first embodiment of the present invention, in which the longitudinal axis of the sensor 10 is in a vertical direction relative to the ground. Fig.11 (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 axes of the sensors 10 are in a vertical direction relative to the ground. Fig.12 (a) is a diagram showing a single sensor 10 according to the first embodiment of the present invention, in which the longitudinal axis of the sensor 10 is in a horizontal direction relative to the ground. Fig.12 (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.

[0100] like Fig.11 and Fig.12 As shown, it can be confirmed that when the multiple measurement device of the present invention is used, the object 60 can be easily detected by the sensor 10 regardless of whether the longitudinal axis of the sensor 10 is formed in the vertical direction or the horizontal direction relative to the ground. In addition, from the comparison between the case of using a single sensor 10 and the case of using a plurality of sensors 10 arranged in parallel, it can be seen that the displacement of the iron (Fe) object 60 can be normally and continuously measured regardless of the non-polar part of the iron (Fe) object 60.

[0101] By means of the above-described structure, the change of the micromagnetic field and magnetic flux of the iron-containing object 60 can be measured, and the position and displacement of the iron-containing object 60 can be measured with ultra-low power. Moreover, as described above, even if a range where the magnetic field of the object 60 is weakened, i.e., a non-polar range, is generated, the magnetic field of the iron-containing object 60 can be detected by other adjacent sensors 10 or coils 200, and the sensor module of the present invention can work normally and continuously.

[0102] Furthermore, as described above, other effects caused by the installation direction of the sensor 10 relative to the ground, etc. can be minimized, and detection and measurement can be performed regardless of the configuration of the sensor module, etc. Furthermore, when a plurality of sensor modules are configured to form a multiple measurement device of the present invention, information such as the moving path, moving speed, and magnetic flux density of the iron-containing object can be determined and used.

[0103] Furthermore, the complex measurement device of the present invention can detect the changes in the micromagnetic field and magnetic flux of the iron-containing object as described above, and can exhibit the same performance regardless of the influence of air, soil, water, etc.

[0104] The above description of the present invention is only for illustration, and those skilled in the art will understand that it can be easily transformed into other specific modes without changing the technical ideas 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 an independent manner can also be implemented in a distributed manner, and the structural elements described in a distributed manner can also be implemented in a combined form.

[0105] 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.

[0106] Description of Reference Numerals

[0107] 1: First sensor module 2: Second sensor module

[0108] 3: Third sensor module 10: Sensor

[0109] 11: 1st-1st sensor 12: 1st-2nd sensor

[0110] 13: 3rd-1st sensor 14: 3rd-2nd sensor

[0111] 20: Impedance matching unit 30: Amplification unit

[0112] 41: First control unit 42: Second control unit

[0113] 50: Output unit 60: Object

[0114] 61: First object 62: Second object

[0115] 63: Third object 64: Fourth object

[0116] 65: Fifth object 100: Core

[0117] 111: 1st-1st core 112: 1st-2nd core

[0118] 121: 2nd-1st core 122: 2nd-2nd core

[0119] 131: 3rd-1st core 132: 3rd-2nd core

[0120] 200: Coil 211: Coil 1-1

[0121] 212: 1st-2nd coil 221: 2nd-1st coil

[0122] 222: 2nd-2nd coil 231: 3rd-1st coil

[0123] 232: 3rd-2nd coil 300: Shell

Claims

1. A multiple measurement device using a probe coil type sensor, characterized in that: include: A sensor module, comprising at least one sensor, wherein the sensor comprises a housing, a core, and a coil, wherein the housing comprises an internal space, the core is formed to be introduced into the internal space of the housing, and the coil is wound around a portion of an outer peripheral surface of the housing corresponding to a position of the core; An impedance matching unit, connected to the sensor module, to perform impedance matching; as well as an amplifier connected to the impedance matching unit to amplify the micro-current and micro-voltage generated when an object approaches the sensor module, The sensor module forms an induction magnetic field by changing the distance between the sensor module and the iron-containing object, and can measure the movement of at least one of the objects. The sensor has a plurality of coils arranged in series. One end of a coil included in one sensor is connected to one end of a coil included in the other 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.

2. The multiple measurement device using a search coil type sensor according to claim 1, characterized in that: The sensor module is formed in a plurality, and the impedance matching unit and the amplifier are connected to each of the plurality of sensor modules.

3. The multiple measurement device using a search coil type sensor according to claim 2, characterized in that: Also includes: a first control unit connected to the plurality of amplifying units and analyzing 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 movement of the object.

4. The multiple measurement device using a search coil type sensor according to claim 3, characterized in that: The second control unit can identify the object having a magnetic flux density within a predetermined magnetic flux density range.

5. The multiple measurement device using a search coil type sensor according to claim 3, characterized in that: The device further includes an output unit connected to the second control unit and configured to visually output the position change of the object.

6. The multiple measurement device using a search coil type sensor according to claim 1, characterized in that: The plurality of sensors are arranged in parallel or radially.

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