JP2014173870A - Measurement device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a measurement device that is easily carried, and allows a simplified operation to measure and display an invisible physical characteristic at various sites.SOLUTION: The measurement device comprises a display 50 that has a sensor substrate having a plurality of magnetic sensors anchored in a 4×4 matrix disposed on a bottom surface, and indicates information relating to a measurement value of the plurality of magnetic sensors at a position of the 4×4 matrix respectively corresponding to an array of the plurality of magnetic sensors. The display 50 indicates the information so that an entire array at a plurality of positions is directed at a direction corresponding to an arrangement direction of the entire array of the plurality of magnetic sensors on the sensor substrate. Preferably, a first casing part (casing bodies 104+102) is made of metal, and a second casing part (a casing body 106) is made of heat resistant resin. The measurement device 10 acquires magnetic data collectively measured by the magnetic sensor, and acquires acceleration data corresponding to a measurement point time of the magnetic data.

Description

  The present invention relates to a measurement apparatus, and more particularly to a measurement apparatus including a display unit that displays information related to measurement values of a plurality of sensors.

  In a measurement apparatus that measures invisible physical characteristics such as a magnetic field (or magnetic field), sound, and heat, measurement results are often expressed by numerical values. For example, a Teslameter that measures a magnetic field expresses the magnetic field only as a numerical value, and does not know in which direction the magnetic field is directed.

  It is desirable to express numerical values measured by such a measuring instrument in a form that is easy to understand visually. Japanese Patent Application Laid-Open Nos. 2010-190709 and 2012-225484 disclose a technique for visualizing numerical values measured by such a measuring instrument.

JP 2010-190709 A JP 2012-22584A

  In the techniques disclosed in JP 2010-190709 A and JP 2012-22584 A, a sensor is moved by an arm on a stage to acquire spatial data, and a personal computer separate from the sensor is obtained. A visualization screen is created by sending data.

  However, when the measurement object changes every moment, it is impossible to accurately grasp the state of a spatial magnetic field or the like by moving one sensor and measuring data. In some cases, it is desirable to grasp the situation of the magnetic field in real time not only in the laboratory but also in various places.

  An object of the present invention is to provide a measuring apparatus which can be easily transported and can measure and display invisible physical characteristics by simple operation in various places.

  In summary, the present invention is a measurement device, which includes a measurement unit in which a plurality of sensors are fixed, and a display unit that displays information on measurement values of the plurality of sensors at a plurality of positions respectively corresponding to the arrangement of the plurality of sensors. With. The display unit displays information so that the entire arrangement of the plurality of positions is in a direction corresponding to the arrangement direction of the entire arrangement of the plurality of sensors of the measurement unit.

Preferably, the plurality of sensors are a plurality of magnetic sensors.
Preferably, the measurement unit is a sensor substrate. The plurality of sensors are arranged in a matrix of m rows and n columns on the sensor substrate, and m and n are both natural numbers of 2 or more.

  Preferably, the measurement unit is disposed on the first surface of the measurement device, the display unit is disposed on the second surface of the measurement device, and the second surface is a surface facing the first surface.

  More preferably, the measuring device further includes a housing having a rectangular parallelepiped shape that accommodates the measuring unit and the display unit. The first surface is a bottom surface of the rectangular parallelepiped, and the second surface is an upper surface of the rectangular parallelepiped facing the bottom surface.

  More preferably, a plurality of casings can be arranged and connected, and a concave portion or a convex portion for positioning with other adjacent casings is formed on a side surface of the casing.

  Preferably, the measuring device includes a control unit for receiving measurement data from the measurement unit and displaying the measurement data on the display unit, a first housing unit supporting the control unit and the display unit, and a measurement unit fixed to the first housing unit. And a second housing part to be supported. The second housing part is formed of a material having a lower magnetic permeability than the first housing part.

More preferably, the first housing part is made of metal, and the second housing part is made of heat-resistant resin.
More preferably, the measurement apparatus acquires the magnetic data measured by the acceleration sensor and the plurality of magnetic sensors at the same time, and controls to acquire the acceleration data measured by the acceleration sensor corresponding to the measurement time of the magnetic data. And a section.

  More preferably, the control unit repeatedly writes a set of magnetic data and acceleration data to the storage device at equal time intervals.

  According to the present invention, since it is possible to directly see in which direction and which strength magnetic field is generated, magnetic field analysis is simplified. In addition, it is possible to grasp the spatial distribution of physical characteristics that are not visible to the eye at the same time that the measurement is performed by the measuring apparatus. Furthermore, since it is easy to transport, it can be easily measured at various locations (in factories, work sites, etc.).

It is a block diagram of measuring device 10 of an embodiment of the invention. 1 is a perspective view of a measuring device 10. FIG. 1 is a plan view of a measuring device 10. FIG. 2 is a bottom view of the measuring device 10. FIG. 1 is a first side view of a measuring device 10. FIG. 3 is a second side view of the measuring device 10. FIG. FIG. 6 is a third side view of the measuring device 10. It is sectional drawing in the VIII-VIII cross section of FIG. 3 is a flowchart for explaining measurement and display control in the measurement apparatus 10; It is the figure which showed the usage example in the welding field of the measuring apparatus. It is a flowchart for demonstrating the measurement process in the case of using an acceleration sensor. It is a flowchart for demonstrating post-processing of the measurement data at the time of measuring using an acceleration sensor. It is a figure for demonstrating the usage example in the case of performing a measurement process using an acceleration sensor. It is a figure which shows the measuring apparatus 400 which is a modification.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In the drawings, the same or corresponding parts are denoted by the same reference numerals and description thereof will not be repeated.

  FIG. 1 is a block diagram of a measuring apparatus 10 according to an embodiment of the present invention. With reference to FIG. 1, measurement apparatus 10 includes a battery substrate 40, a sensor substrate 20, a control substrate 30, a display 50 with a touch panel, and a communication bus line 60.

  The battery board 40 mounts a battery and supplies a power supply voltage to the sensor board 20, the control board 30, and the display 50 with a touch panel.

  The sensor substrate 20 includes a plurality of magnetic sensors 21-1 to 21-16, a sub CPU (Central Processing Unit) 22, and a communication circuit 23. Magnetic data measured at the same time by the plurality of magnetic sensors 21-1 to 21-16 is output to the communication bus line 60 via the sub CPU 22 and the communication circuit 23. The communication bus line 60 is not particularly limited. For example, a serial communication bus such as a LIN bus can be used.

  The control board 30 includes a main CPU 31, an acceleration sensor 32, a storage device such as a ROM 33, a RAM 34, a USB (registered trademark) (Universal Serial Bus) input / output unit 35, a communication circuit 36, and a connector 37 for connection. Including. The main CPU 31 receives magnetic data measured by the sensor substrate 20 from the communication bus line 60 via the communication circuit 36. The main CPU 31 stores this magnetic data in the RAM 34 as necessary.

  Each of the magnetic sensors 21-1 to 21-16 can detect the direction of the magnetic field together with the strength of the magnetic field, and the magnetic data includes data on the strength and the direction. The main CPU 31 displays a graphic such as an arrow on the display 50 with the touch panel in a manner in which the strength and direction of each position are easily visible based on the data of the strength and direction detected by each magnetic sensor. As the magnetic sensor, a Hall element, a flux gate sensor, or the like that can determine the direction of the magnetic field can be used.

  The acceleration sensor 32 measures acceleration data in order to detect the movement of the measuring device 10. The main CPU 31 stores magnetic data and acceleration data at the corresponding time for analysis of the spatial magnetic field. As the storage destination, a USB (registered trademark) memory connected to the USB (registered trademark) input / output unit 35 can be used. Data stored in the USB (registered trademark) memory can be displayed on the screen in a manner in which a spatial magnetic field can be easily grasped by reading the data into a personal computer or the like after the measurement by the measuring apparatus 10 and processing it. .

  The ROM 33 stores programs used in the main CPU 31 and various data. The ROM 33 may be a nonvolatile memory. The RAM 34 is used as a work area for processing of the main CPU 31 and a storage area for measured data.

  The communication circuit 36 is used to exchange data with the communication bus line 60 in the same manner as the communication circuit 23.

  The connector 37 for connection is a connector for connecting to the measuring device 10 arranged adjacently when a large number of measuring devices 10 are used side by side.

  The measuring apparatus 10 uses a plurality of magnetic sensors and directly displays data output from each sensor on a display screen. Moreover, the measuring apparatus 10 can simultaneously measure the moving distance and speed of the measuring apparatus 10 from the information of the acceleration sensor 32 that is simultaneously measured with the magnetic sensors 21-1 to 21-16.

  The measuring device 10 is characteristic in the following points. A plurality of magnetic sensors are arranged in an array on the sensor substrate, and one acceleration sensor is arranged on the control substrate.

  The measured data is simply processed by the sub CPU 22 and only data necessary for display is transmitted to the main CPU 31. Note that the number of sub CPUs 22 may be increased depending on the number of magnetic sensors.

  The main CPU 31 stores data on a USB (registered trademark) memory or the like while displaying data on the display 50.

  The measuring apparatus 10 may be fixed and statically measure the magnetic field, but may be measured by measuring the magnetic field in the space by moving it in the hand.

  FIG. 2 is a perspective view of the measuring apparatus 10. FIG. 3 is a plan view of the measuring apparatus 10. FIG. 4 is a bottom view of the measuring apparatus 10.

  2 to 4, in the measuring apparatus 10, a display 50 is arranged on the top surface, and a sensor substrate 20 on which magnetic sensors 21-1 to 21-16 are arranged in four rows and four columns is arranged on the bottom surface. . The housing of the measuring apparatus 10 is secured to the housing 104 by a housing 102 that is a frame of the display 50 and a housing 106 that is a frame of the sensor substrate 20.

  As shown in FIG. 3 and FIG. 4, the display 50, which is a display unit, has a magnetic field at a position of 4 rows and 4 columns corresponding to the 4 rows and 4 columns of the plurality of magnetic sensors 21-1 to 21-16. Information about the measurement values of the sensors 21-1 to 21-16 is displayed. For example, as the information display format, the direction of the magnetic field can be indicated by the direction of the arrow, and the strength of the magnetic field can be indicated by the length of the arrow.

  The arrangement of sensors and arrows is not limited to 4 rows and 4 columns, but can be m rows and n columns (m and n are natural numbers of 2 or more). Preferably, when a liquid crystal panel or the like is used as the display 50, a flame-retardant transparent resin plate is used for protection during measurement (for example, protection from welding spatter in the case of measurement during welding). You may make it fit.

  Thereby, based on the measured value detected at the same time by the magnetic sensors 21-1 to 21-16, it is possible to display in a manner that makes it easy to grasp the state of the magnetic field. In particular, since the display 50 is disposed on the surface facing the sensor substrate 20, the magnetic field can be visualized and viewed as if viewed through a magnifying glass.

  In particular, by arranging a plurality of sensors on the surface, it is possible to measure and display the magnetic field distribution so as to be intuitively understood.

  In order to obtain such an effect, the magnetic sensor 21 is placed on the display 50 at a corresponding position of 4 rows and 4 columns as viewed through the magnetic sensors 21-1 to 21-16 as viewed from the display 50 side. Arrows corresponding to the measured values of −1 to 21-16 are displayed. The arrow is an example, and may be a simple numerical display or may be modified as follows.

  As shown in FIG. 3, the display method on the display 50 is not limited to expressing the vector information of each sensor as it is with a figure such as an arrow, and the intensity is expressed in color, or the Z direction in a three-dimensional direction. May be expressed in the shape of an arrow. By displaying using these methods, the state of the magnetic field can be intuitively understood on the spot by the measurer. In addition, an expression method such as a contour line is possible by combining a plurality of vector information respectively obtained by a plurality of sensors and calculating an intermediate value between the sensors.

  Further, instead of the display 50, a light-emitting diode or lamp of 4 rows and 4 columns (more preferably, the luminance and color can be changed) may be arranged as a display unit.

  FIG. 5 is a first side view of the measuring apparatus 10. FIG. 6 is a second side view of the measuring apparatus 10. The second side surface is a side surface facing the first side surface, and when the measuring device 10 is disposed adjacent to the second side surface, the second side surface is disposed such that the first side surface and the unevenness of the adjacent measuring device 10 are combined. Is done.

  Referring to FIG. 5, recesses 108 and 110 are formed on the first side surface of housing 104. A female connector 112 is disposed on the first side surface.

  Referring to FIG. 6, convex portions 118 and 120 are formed on the second side surface of housing 104. A male connector 122 is disposed on the second side surface.

  When a plurality of measuring apparatuses 10 are used, they have a function of being connected to each other, and can transmit and receive data between sensors. In the case of multiple use, the convex portions 118 and 120 and the male connector 122 are inserted into the concave portions 108 and 110 and the female connector 112 of the measuring device arranged adjacent to each other. Since it has such a structure, it is easy to accurately determine the relative measurement positions of a plurality of sensors.

  FIG. 7 is a third side view of the measuring apparatus 10. The third side surface is a side surface that does not oppose the first side surface and the second side surface, and is one of two side surfaces that are orthogonal to the first side surface and the second side surface. Referring to FIG. 7, various interfaces are arranged on the third side surface. Specifically, USB (registered trademark) connectors 124 and 126, a power switch 128, and connectors 130 and 132 for connecting signal lines, power lines, and the like are arranged on the third side.

  The measured data is not directly displayed on the display 50, but can be output to a personal computer or an analysis device later to analyze the data. For this purpose, USB (registered trademark) connectors 124 and 126 and connectors 130 and 132 are provided.

  Magnetic data and acceleration data measured at the same time at equal time intervals can be stored in an internal memory or a USB (registered trademark) memory connected to the USB (registered trademark) connector 124. Later, by reading the data into a personal computer or analysis device and analyzing it, the magnetic field of the place through which the measurement device 10 has passed can be virtually shown.

  8 is a cross-sectional view taken along the line VIII-VIII in FIG. 2 and 8, the control board 30 is fixed to the upper side of the housing 104, and the battery board 40 is fixed to the lower side. On the battery substrate 40, two batteries 44 are mounted in three battery cases 42, respectively. Further, the housing 102 to which the display 50 is fixed is screwed to the housing 104 from above. A housing 106 to which the sensor substrate 20 is fixed is screwed to the housing 104 from below.

  The casings 102 and 104 are made of a metal such as aluminum. On the other hand, the housing 106 is made of resin. Metal has a high shielding performance against electromagnetic noise, and is suitable for protecting electronic circuits such as a CPU from noise and preventing malfunction. On the other hand, since metal has a high magnetic permeability, it affects the magnetic field. The housing 106 is a portion close to the sensor substrate 20 and is preferably made of a material that does not disturb the magnetic field to be measured. Therefore, a resin having a lower magnetic permeability than the material used for the housings 102 and 104 is used for the housing 106. As this resin, for example, a material obtained by pressure-molding a material mainly composed of an unsaturated polyester resin or an epoxy-modified resin can be used.

  The casings 102 and 104 constitute a first housing part that supports the control board 30 and the display 50. On the other hand, the housing 106 constitutes a second housing part that is fixed to the first housing part and supports the sensor substrate 20. And the 2nd housing part is formed with the material whose magnetic permeability is lower than the 1st housing part.

  FIG. 9 is a flowchart for explaining control of measurement and display in the measurement apparatus 10. Referring to FIG. 9, main CPU 31 in FIG. 1 determines whether or not the calibration switch is turned on in step S1. The calibration switch can be a button displayed on the display 50 with a touch panel, but a switch (not shown) may be provided.

  If the calibration switch is turned on in step S1, the process proceeds to step S2, and the main CPU 31 causes the magnetic sensors 21-1 to 21-16 on the sensor substrate 20 to perform measurement of the initial magnetic field, and in step S3. The measured data is stored as an initial value in the memory (RAM 34), and the process proceeds to step S4. On the other hand, if the calibration switch is not turned on in step S1, the direct processing proceeds to step S4.

  In step S4, the main CPU 31 determines whether there is a measurement start instruction. The measurement start instruction is given from a button displayed on the display 50 with a touch panel, but a switch (not shown) may be provided.

  Until a measurement start instruction is issued in step S4, the instruction is awaited. When a measurement start instruction is given in step S4, the main CPU 31 advances the process to step S5 to cause the magnetic sensors 21-1 to 21-16 on the sensor substrate 20 to perform magnetic field measurement. Subsequently, in step S6, the main CPU 31 executes a process of subtracting the initial value stored in the memory from the measurement value in step S5. When calibration is not executed, the initial value is set to zero or a fixed value adjusted in advance.

  Thereafter, in step S7, the main CPU 31 causes the display unit (display 50) to display an arrow indicating the direction and strength corresponding to each data of the magnetic sensors 21-1 to 21-16 as shown in FIG.

  Further, in step S8, the main CPU 31 determines whether or not there is a measurement end instruction. The measurement end instruction is given from a button displayed on the display 50 with a touch panel, but a switch (not shown) may be provided.

  In step S8, while the measurement end instruction is not given, the processing of steps S5 to S7 is repeatedly executed, and the state of the changing magnetic field is continuously displayed on the display 50. Therefore, it is possible not only to know the state of the magnetic field in real time in the field of experiments and work, but also to observe how the magnetic field changes.

  If a measurement end instruction is given in step S8, the process proceeds to step S9 and the measurement ends. The measurement end instruction may be turning off the power switch.

  FIG. 10 is a diagram showing an example of use of the measuring apparatus 10 at a welding site. In welding, since a current flows in an arc, it is known that when a strong magnetic field is present, a phenomenon called magnetic blowing in which the arc is bent occurs. When magnetic blowing occurs, the weld bead is disturbed and the quality of the weld deteriorates. For this reason, when attempting welding, there is a case where it is desired to grasp what magnetic field is generated at the site.

  In FIG. 10, three measuring devices 10-1 to 10-3 and 10-4 to 10-6 are arranged adjacent to each other on both sides of the weld line 204 for welding the base materials 200 and 202, and the end of the weld line 204 is arranged. A measuring device 10-7 is arranged in the vicinity. If the magnetic field is measured in such a manner, the state of the magnetic field around the weld line can be seen at a glance in real time simply by looking at the display of the measuring device. When the magnetic field is disturbed, it becomes easy to search for the cause of the disturbed magnetic field and take measures against magnetic blow.

  In the case of welding, the housing 106 on the sensor substrate side may come into contact with the base material or be placed near the arc, so a resin having high heat resistance and arc resistance may be used. preferable. In addition, since the base material allows magnetic flux to pass through, the housing 106 is made of a material having lower permeability than the base material or the metal housings 102 and 104 so that the magnetic flux from the base material does not easily enter the control board. It is preferable to use it. On the other hand, the metal casings 102 and 104 are preferably made of metal rather than resin in terms of protecting the control board 30 from noise, and by inserting a solid ground layer (ground plane layer) into the battery board 40 of FIG. Further shielding effect is enhanced.

  In order to further improve the shielding performance, a metal lid may be provided at the opening of the connector shown in the side views of FIGS.

  FIG. 11 is a flowchart for explaining measurement processing when using an acceleration sensor.

  Referring to FIGS. 1 and 11, when the process is started, first, in step S21, main CPU 31 determines whether or not there is a measurement start instruction. The measurement start instruction is given from a button displayed on the display 50 with a touch panel, but a switch (not shown) may be provided.

  Until a measurement start instruction is issued in step S21, the instruction is waited. When a measurement start instruction is given in step S21, the main CPU 31 advances the process to step S22 to cause the magnetic sensors 21-1 to 21-16 on the sensor substrate 20 to perform magnetic field measurement and at the same time. Thus, the acceleration sensor 32 is also caused to measure the acceleration. Then, the measured data is written into a USB (registered trademark) memory or an internal memory.

  In step S23, the main CPU 31 determines whether there is a measurement end instruction. The measurement end instruction is given from a button displayed on the display 50 with a touch panel, but a switch (not shown) may be provided.

  In step S23, while the measurement end instruction is not given, the process proceeds to step S24, and execution of a predetermined time (fixed time) is awaited so that the measurement is performed at equal time intervals, and then, in step S22. Processing proceeds and measurements are taken again.

  If a measurement end instruction is given in step S23, the process proceeds to step S25, and the measurement ends.

  FIG. 12 is a flowchart for explaining post-processing of measurement data when measurement is performed using an acceleration sensor. This process may be performed by the main CPU 31 or a separate personal computer.

  Referring to FIG. 12, when the process is started, acceleration data and magnetic data are read from a USB (registered trademark) memory in step S30. In step S31, the moving distance of the measuring apparatus 10 is calculated from the measurement time interval and acceleration data.

  Thereafter, in step S32, processing for converting the movement distance into the spatial position information (X, Y, Z) of the measurement point is executed. Further, in step S33, after a process of displaying the spatial position and the magnetic data in correspondence with each other on the screen is executed, the display process ends in step S34.

  FIG. 13 is a diagram for explaining an example of use when measurement processing is performed using an acceleration sensor. Referring to FIG. 13, measurement apparatus 300 includes a plurality of measurement apparatuses 10 (measurement apparatuses 10-1 to 10-5) and a handle 302 connected to each other.

  If the measurement apparatus 300 is moved in a space where the magnetic field is to be measured after the measurement is started by holding the handle 302, the magnetic data on the movement locus can be measured. In particular, if the magnetic field is stable, the magnetic field in the space can be easily measured and analyzed.

  Although FIG. 13 illustrates an example in which a plurality of measuring devices 10 are connected and a handle 302 is attached thereto, the measuring device 10 may be used as having a handle. In this case, the magnetic field can be observed in real time by looking at the display surface (display side) with the measurement surface (sensor substrate side) facing the place to be observed like a magnifying glass.

[Modification]
FIG. 14 is a view showing a measuring apparatus 400 which is a modified example. 2 to 8 show an example in which the sensor substrate and the display are arranged on the opposing surfaces of the housing, but the housing 406 containing the sensor substrate and the display 50 are arranged as shown in FIG. It may be configured such that measurement can be performed separately from 402. In addition, although the shape of a sensor board | substrate is a square in FIG. 14, you may deform | transform variously, such as a circle and a triangle. In this case, the display on the display 50 is changed to an image representation corresponding to the arrangement of the sensors on the sensor board.

  For example, although the case where the housing 406 and the housing 402 are connected by the cable 404 is shown, the display unit and the measurement unit may be connected by an arm or the like, or may be connected wirelessly. In these cases, in order to make it easy to understand intuitively, it is preferable to display the display unit in an orientation corresponding to the orientation of the measurement unit. For example, it is fixed with a frame or arm so that the orientation of the display unit and the direction of the measurement unit are the same, or in the case of wireless, the orientation information is given to the display unit and the display unit determines the orientation. It is preferable to rotate the display.

  As described above, according to the present embodiment, the following various effects can be obtained. First of all, what has been expressed numerically, such as Teslameter, has been visualized and the direction has been clarified. In addition, a single sensor cannot simultaneously obtain the surrounding magnetic field distribution, but a surface analysis can be performed by arranging a plurality of sensors. Furthermore, a magnetic field in space can be easily expressed by a combination with an acceleration sensor. Since repeated measurement results can be displayed in real time in an easy-to-understand manner, the state of the magnetic field can be easily confirmed.

  In addition, since measurement is performed with a plurality of magnetic sensors at the same time, application to an alternating magnetic field and application to a high-frequency magnetic field are possible, unlike measurement by moving one sensor.

  Finally, this embodiment will be summarized with reference to the drawings again. Referring to FIG. 1, measuring apparatus 10 includes a sensor substrate 20 to which a plurality of sensors 21-1 to 21-16 are fixed, and a plurality of positions corresponding to the arrangement of the plurality of sensors 21-1 to 21-16. And a display 50 for displaying information on the measurement values of the plurality of sensors 21-1 to 21-16. The display 50 displays information so that the entire arrangement of the plurality of positions is in a direction corresponding to the arrangement direction of the entire arrangement of the plurality of sensors 21-1 to 21-16 on the sensor substrate 20.

Preferably, the plurality of sensors 21-1 to 21-16 are a plurality of magnetic sensors.
Preferably, the plurality of sensors 21-1 to 21-16 are arranged on the sensor substrate 20 in a matrix of m rows and n columns, and m and n are both natural numbers of 2 or more. 3 and 4 exemplify the case where both m and n are 4, m and n may be different from 4.

  Preferably, the sensor substrate 20 is disposed on the first surface (bottom surface) of the measuring device 10, the display 50 is disposed on the second surface (top surface) of the measuring device 10, and the second surface faces the first surface. It is a surface to do.

  More preferably, as shown in the perspective view of FIG. 2, the measuring apparatus 10 further includes a housing having a rectangular parallelepiped shape that accommodates the sensor substrate 20 and the display 50. The first surface is a bottom surface of the rectangular parallelepiped, and the second surface is an upper surface of the rectangular parallelepiped facing the bottom surface.

  More preferably, as shown in FIGS. 10 and 13, the housing of the measuring apparatus 10 is configured to be able to be connected and arranged, and as shown in FIGS. 2, 5, and 6, Concave portions 108 and 110 or convex portions 118 and 120 for positioning with other adjacent housings are formed on the side surfaces.

  Preferably, the measurement apparatus 10 receives the measurement data from the sensor substrate 20 and displays the measurement data on the display 50, the first casing (housing 104 + 102) that supports the control substrate 30 and the display 50, the first A second casing (housing 106) that is fixed to the first casing and supports the sensor substrate 20 is further provided. As described with reference to the cross-sectional view of FIG. 8, the second housing part is formed of a material having a lower magnetic permeability than the first housing part.

  More preferably, as described with reference to the cross-sectional view of FIG. 8, the first casing (housing 104 + 102) is made of metal, and the second casing (housing 106) is made of heat-resistant resin.

  More preferably, the measurement apparatus 10 acquires the magnetic data collectively measured by the acceleration sensor 32 and the plurality of magnetic sensors, and the acceleration data measured by the acceleration sensor 32 corresponding to the measurement time of the magnetic data. And a main CPU 31 to be acquired.

  More preferably, the main CPU 31 repeatedly writes a set of magnetic data and acceleration data to the RAM 34 or USB (registered trademark) memory as a storage device at equal time intervals.

  In the present embodiment, the measurement of the magnetic field has been described as an example. However, the present invention is applicable to any physical quantity measuring device that is not visible. That is, the present invention can be applied to a measuring apparatus that easily measures other physical quantities by arranging a plurality of sensors that measure electric fields, temperatures, heat, and the like instead of a plurality of magnetic sensors.

  The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

  10, 300, 400 Measuring device, 20 sensor board, 21 magnetic sensor, 22 sub CPU, 23, 36 communication circuit, 30 control board, 31 main CPU, 32 acceleration sensor, 33 ROM, 34 RAM, 35 USB (registered trademark) Input / output unit, 37 Connector for connection, 40 Battery board, 42 Battery case, 44 Battery, 50 Display, 60 Communication bus line, 102 Housing, 108, 110 Recess, 112 Female connector, 118, 120 Convex, 122 Male connector , 124, 126, 130, 132 connector, 128 power switch, 200 base material, 204 weld line, 302 handle, 404 cable.

Claims (10)

A measuring unit to which a plurality of sensors are fixed;
A display unit that displays information on the measurement values of the plurality of sensors at a plurality of positions respectively corresponding to the arrangement of the plurality of sensors;
The display device displays the information so that the entire array of the plurality of positions is in an orientation corresponding to the orientation of the entire array of the plurality of sensors of the measurement unit.   The measuring device according to claim 1, wherein the plurality of sensors are a plurality of magnetic sensors. The measurement unit is a sensor substrate,
The plurality of sensors are arranged on the sensor substrate in a matrix of m rows and n columns,
The measuring apparatus according to claim 1, wherein both m and n are natural numbers of 2 or more. The measurement unit is disposed on the first surface of the measurement device,
The display unit is disposed on a second surface of the measuring device,
The measuring apparatus according to claim 1, wherein the second surface is a surface facing the first surface. It further includes a housing having a rectangular parallelepiped shape that accommodates the measurement unit and the display unit,
The first surface is a bottom surface of the rectangular parallelepiped,
The measurement apparatus according to claim 4, wherein the second surface is an upper surface of the rectangular parallelepiped facing the bottom surface. The casing is configured to be able to be connected in a plurality,
The measuring device according to claim 5, wherein a concave portion or a convex portion for positioning with another adjacent housing is formed on a side surface of the housing. A control unit for receiving measurement data from the measurement unit and displaying the measurement data on the display unit;
A first housing part that supports the control part and the display part;
A second housing part fixed to the first housing part and supporting the measurement part;
The measuring apparatus according to claim 1, wherein the second casing part is formed of a material having a lower magnetic permeability than the first casing part.   The measuring apparatus according to claim 7, wherein the first casing part is made of metal, and the second casing part is made of a heat-resistant resin. An acceleration sensor;
The apparatus further comprises a control unit that acquires magnetic data measured at once by the plurality of magnetic sensors and acquires acceleration data measured by the acceleration sensor corresponding to the measurement time of the magnetic data. The measuring device described in 1.   The measurement apparatus according to claim 9, wherein the control unit repeatedly writes the set of the magnetic data and the acceleration data to the storage device at equal time intervals.

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