Mounting device and physical quantity detection device

Abstract

To provide mounting devices, etc., that suppress heat transfer from the object being measured to the physical quantity sensor. [Solution] This embodiment relates to a mounting device 1000 for attaching a physical quantity sensor 100 to a measurement target 2000. The mounting device 1000 includes a frame-shaped base 1100, a first holding part 1210, a second holding part 1220, a first magnet 1310, and a second magnet 1320. The base 1100 mounts the physical quantity sensor 100 and has a peripheral edge 1102 surrounding an opening. The first holding part 1210 is positioned inside the opening when viewed in the opening direction and rotates around a first axis S1 perpendicular to the opening direction. The second holding part 1220 is positioned inside the opening when viewed in the opening direction and rotates around a second axis S2 parallel to the first axis S1. The first magnet 1310 is held by the first holding part 1210 and is attracted to the measurement target 2000. The second magnet 1320 is held by the second holding part 1220 and is attracted to the object to be measured 2000.

Description

Technical Field

[0001] The present invention relates to a mounting device, a physical quantity detection device, and the like.

Background Art

[0002] Conventionally, a mounting device for fixing a device such as a sensor to a curved surface has been known. Patent Document 1 discloses a method in which hinges are arranged on both side surfaces of a base, and a magnet mounting plate for fixing a magnet is coupled to the hinge, so that a device can be fixed to a curved surface.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] Patent Document 1 does not consider the case of attaching a device to a curved surface that generates heat, such as a motor.

Means for Solving the Problems

[0005] One aspect of the present disclosure relates to a mounting device for attaching a physical quantity sensor to a measurement object, including a frame-shaped base that mounts the sensor and has a peripheral portion surrounding an opening, a first holding portion that is disposed in the opening as viewed in the opening direction and rotates around a first axis perpendicular to the opening direction, a second holding portion that is disposed in the opening as viewed in the opening direction and rotates around a second axis parallel to the first axis, a first magnet that is held by the first holding portion and adsorbs to the measurement object, and a second magnet that is held by the second holding portion and adsorbs to the measurement object. relates to.

[0006] Another aspect of the present disclosure relates to a physical quantity detection device including the above mounting device and the physical quantity sensor. [Brief explanation of the drawing]

[0007] [Figure 1] A diagram illustrating an example configuration of a physical quantity sensor, mounting device, and physical quantity detection device. [Figure 2] A diagram illustrating an example of the configuration of the mounting device. [Figure 3] Cross-sectional view AA in Figure 2. [Figure 4] Another diagram illustrating an example of the mounting device configuration. [Figure 5] Cross-sectional view of CC in Figure 4. [Figure 6] A diagram illustrating the through-hole of the mounting device and the first screw in more detail. [Figure 7] A diagram illustrating the restriction of rotation of the first holding part. [Figure 8] A diagram illustrating the restriction of rotation of the first and second magnets. [Figure 9] A diagram illustrating an example of a fixed part. [Figure 10] Another diagram illustrating an example configuration of a physical quantity sensor. [Modes for carrying out the invention]

[0008] Preferred embodiments of this disclosure will be described in detail below. Note that these embodiments are not intended to unduly limit the scope of the claims, and not all configurations described in these embodiments are necessarily essential.

[0009] Figure 1 is a perspective view illustrating an example configuration of a physical quantity detection device 10 including the mounting device 1000 of this embodiment. The physical quantity detection device 10 includes a physical quantity sensor 100 and a mounting device 1000. The physical quantity detection device 10 is detachable from the object to be measured 2000 via the mounting device 1000. Furthermore, the physical quantity detection device 10 of this embodiment is configured so that the physical quantity sensor 100 and the mounting device 1000 are detachable. In Figure 1, the physical quantity detection device 10 is shown with the physical quantity sensor 100 and the mounting device 1000 attached, and the physical quantity detection device 10 is further shown attached to the object to be measured 2000. Note that in Figure 1, the mounting device is shown with the first screw 1410 and the second screw 1420 tightened, but the details of these will be described later. Also, in Figure 1, the physical quantity sensor 100 is shown including screw holes 121 and 122, but the details of these will be described later in Figures 9 and 10.

[0010] Note that the dimensions of each component and the spacing between components shown in each figure of this embodiment are only schematic for the sake of explanation and may not be consistent across all figures. Also, for the sake of explanation, each figure shows three mutually orthogonal axes: the X-axis, Y-axis, and Z-axis. The direction along the X-axis is called the "X-axis direction," the direction along the Y-axis is called the "Y-axis direction," and the direction along the Z-axis is called the "Z-axis direction." Furthermore, the tip of the arrow in each axis direction is called the "positive side," the base end is called the "negative side," the positive side in the Z-axis direction is called the "upper side," and the negative side in the Z-axis direction is called the "lower side." In this embodiment, the direction parallel to the thickness direction of the mounting device 1000 is defined as the Z-axis direction. Therefore, the direction in which the physical quantity sensor 100 is attached to the mounting device 1000 can also be called the upper side, and the direction in which the object to be measured 2000 is attached to the mounting device 1000 can also be called the lower side.

[0011] Furthermore, as will be described later, the method of this embodiment is particularly effective when the object to be measured 2000 is a cylindrical object. In this embodiment, the Y-axis is defined as the axis parallel to the central axis of the cylinder relating to the object to be measured 2000. The Y-axis direction is also parallel to the first axis S1 and the second axis S2, which will be described later. In addition, the direction in which the first screw 1410 and the second screw 1420 advance is aligned with the positive side of the Y-axis direction.

[0012] The physical quantity sensor 100 detects physical quantities transmitted from the object to be measured 2000 via the mounting device 1000. These physical quantities include, for example, acceleration, velocity, displacement, angular acceleration, angular velocity, or angle. In other words, the physical quantity sensor 100 detects these physical quantities and outputs a signal indicating the detected physical quantity. These physical quantities can also be considered information representing the vibration of the object to be measured 2000, and the physical quantity sensor 100 can also be called a vibration sensor. The physical quantity sensor 100 may detect one type of physical quantity, or it may detect multiple types of physical quantities. Furthermore, the physical quantity sensor 100 may detect a physical quantity along one axis, or it may detect physical quantities along two or more axes.

[0013] The physical quantity sensor 100 is specifically, for example, an acceleration sensor or gyroscope using a quartz crystal oscillator as a detection element, or an acceleration sensor or gyroscope using a MEMS as a detection element, but it may also be an inertial measurement unit (IMU) that combines the acceleration sensor and the gyroscope into a unit. The physical quantity sensor 100 may detect velocity or displacement by integrating the acceleration detected by the detection element, or it may use a detection element that detects velocity, etc. The physical quantity sensor 100 may detect angular acceleration or angle by differentiating or integrating the angular velocity detected by the detection element, or it may use a detection element that detects angular acceleration, etc. An acceleration sensor, for example, utilizes the fact that the vibration frequency changes in response to the stress applied to a quartz crystal oscillator and detects acceleration by measuring that vibration frequency. A gyroscope, for example, detects angular velocity by detecting the Coriolis force applied to a quartz crystal oscillator. The physical quantity sensor 100 may also be configured with a mass part and electrodes made of MEMS, and detect acceleration or angular velocity by detecting the capacitance between electrodes that changes in response to the inertial force applied to the mass part.

[0014] The object to be measured 2000 includes, for example, a vibration source that generates vibration through mechanical operation. The physical quantity sensor 100 detects vibrations of the object to be measured 2000 caused by the vibration source. The vibration source is, for example, a motor, engine, or turbine. Alternatively, the object to be measured 2000 may not include a vibration source, and vibrations may be applied to the object to be measured 2000 from the outside, and these vibrations may be detected by the physical quantity sensor 100. The object to be measured 2000 is, for example, the vibration source itself, i.e., a motor, engine, or turbine. Or, the object to be measured 2000 is a machine, equipment, or device that includes a vibration source, such as household appliances or industrial equipment such as printers, air conditioners, robots, pumps, belt conveyors, or processing equipment, mobile objects such as automobiles or airplanes, or industrial equipment such as generators or manufacturing plants. Alternatively, the object to be measured 2000 may be a structure that vibrates due to external forces, such as a building, road, or bridge. As mentioned above, although a cylindrical measurement target 2000 is used as an example in this embodiment, the shape of the mounting device 1000 is not limited to a cylindrical shape. Furthermore, at least a portion of the surface of the measurement target 2000 in this embodiment shall contain a ferromagnetic material. More specifically, the surface of the measurement target 2000 shall contain a ferromagnetic material to such an extent that it can be attracted by magnetic force to the first magnet 1310 and the second magnet 1320, which will be described later.

[0015] An example of the configuration of the mounting device 1000 of this embodiment will be explained using Figures 2, 3, 4, and 5. Figure 2 is a view of Figure 1 from above, with the composition modified so that the X-axis is parallel to the horizontal plane of the paper, and Figure 3 is a cross-sectional view AA of Figure 2. Figure 4 is a view of the mounting device 1000 from below, with the first suction surface 1311 and the second suction surface 1322, which will be described later, parallel to the X-axis, and Figure 5 is a cross-sectional view CC of Figure 4. Note that in Figure 2, the physical quantity sensor 100 and the object to be measured 2000 have been appropriately omitted from Figure 1 in order to make it easier to understand the purpose of this embodiment.

[0016] As shown in FIG. 2, the mounting device 1000 includes a frame-shaped base 1100, a first holding portion 1210, and a second holding portion 1220. Although only slightly visible from FIG. 2, as shown in FIGS. 3, 4, and 5, the first holding portion 1210 holds a first magnet 1310. Similarly, the second holding portion 1220 holds a second magnet 1320. Details of the first magnet 1310 and the second magnet 1320 will be described later. The specific means by which the first holding portion 1210 holds the first magnet 1310 and the specific means by which the second holding portion 1220 holds the second magnet 1320 will be described later. That is, the mounting device 1000 of the present embodiment includes a frame-shaped base 1100, a first holding portion 1210, a second holding portion 1220, a first magnet 1310, and a second magnet 1320.

[0017] Details will be described later, but the first holding portion 1210 and the second holding portion 1220 of the present embodiment are configured to be rotatable. For example, as shown in FIG. 3, a through hole is formed in the first holding portion 1210 in a direction parallel to the Y-axis, and the first holding portion 1210 is rotated around the Y-axis indicated by D11 by a predetermined member passing through the through hole. In the present embodiment, the predetermined member is exemplified by the first screw 1410 shown in FIG. 2, but it is not limited to this and may be a rod-shaped member such as a pin, and is not particularly limited. Similarly, in the present embodiment, a through hole is also formed in the second holding portion 1220 in a direction parallel to the Y-axis, and it is exemplified that the second holding portion 1220 is rotated around the Y-axis indicated by D12 by the second screw 1420 passing through the through hole. As shown in FIG. 3, when the first magnet 1310 and the second magnet 1320 are attached to the measurement object 2000, the rotation of the first holding portion 1210 and the second holding portion 1220 may be restricted by the first screw 1410 and the second screw 14, and details will be described later in FIGS. 6 and 7.

[0018] Hereinafter, the axis around which the first holding part 1210 rotates is referred to as the first axis S1, and the axis around which the second holding part 1220 rotates is referred to as the second axis S2. In other words, the first holding part 1210 rotates around the first axis S1, and the second holding part 1220 rotates around the second axis S2. Also, from another perspective, since the first magnet 1310 is held by the first holding part 1210 as described above, it can also be considered that the first magnet 1310 rotates around the first axis S1. Similarly, it can also be considered that the second magnet 1320 rotates around the second axis S2.

[0019] The base 1100 has an opening in a direction parallel to the thickness direction (i.e., the Z-axis direction). That is, in this embodiment, the Z-axis direction can also be referred to as the opening direction. The base 1100 may be formed of metal or resin as long as it is hard.

[0020] The base 1100 has a peripheral edge portion 1102 surrounding the opening. For convenience of explanation, hereinafter, the peripheral edge portion 1102 on the upper side in FIG. 2 is simply referred to as the "peripheral edge portion 1102 on the upper side", the peripheral edge portion 1102 on the lower side in FIG. 2 is simply referred to as the "peripheral edge portion 1102 on the lower side", the peripheral edge portion 1102 on the left side in FIG. 2 is simply referred to as the "peripheral edge portion 1102 on the left side", and the peripheral edge portion 1102 on the right side in FIG. 2 is simply referred to as the "peripheral edge portion 1102 on the right side". That is, the base 1100 constitutes a rectangular frame composed of the peripheral edge portion 1102 on the upper side, the peripheral edge portion 1102 on the lower side, the peripheral edge portion 1102 on the left side, and the peripheral edge portion 1102 on the right side.

[0021] Furthermore, as shown in Figure 2, the base 1100 has a pair of first protrusions 1111 that project from the peripheral edge 1102 in a direction toward each other along the first axis S1 when viewed from the opening direction (more precisely, when viewed from the positive Z-axis direction). Similarly, the base 1100 has a pair of second protrusions 1112 that project from the peripheral edge 1102 in a direction toward each other along the second axis S2 when viewed from the opening direction. In this embodiment, the base 1100 does not necessarily have to include the first protrusions 1111 and the second protrusions 1112, but as will be described later, by including the first protrusions 1111 in the base 1100, the rotational movement of the first holding part 1210 can be intentionally controlled. Similarly, by including the second protrusions 1112 in the base 1100, the rotational movement of the second holding part 1220 can be controlled.

[0022] For the sake of clarity, in the following explanation, of the pair of first protrusions 1111, the first protrusion 1111 on the upper side of Figure 2 will be referred to as the "positive first protrusion 1111," and the first protrusion 1111 on the lower side of Figure 2 will be referred to as the "negative first protrusion 1111." Furthermore, when it is not necessary to distinguish between the positive and negative first protrusions 1111, they will simply be referred to as the "first protrusion 1111." Similarly, of the pair of second protrusions 1112, the second protrusion 1112 on the upper side of Figure 2 will be referred to as the "positive second protrusion 1112," and the second protrusion 1112 on the lower side of Figure 2 will be referred to as the "negative second protrusion 1112." Furthermore, if it is not necessary to distinguish between the positive-side second protrusion 1112 and the negative-side second protrusion 1112, they are simply referred to as "second protrusion 1112".

[0023] As shown in Figure 2, the lengths of the first protrusion 1111 and the second protrusion 1112 in the Y-axis direction are longer than the length of the peripheral edge 1102 in the Y-axis direction. Therefore, the size of the opening between the first protrusion 1111 in the base 1100 is smaller than the size of the opening between the peripheral edges 1102. Similarly, the size of the opening between the second protrusion 1112 in the base 1100 is narrower than the size of the opening between the peripheral edges 1102.

[0024] Alternatively, from a different perspective, the base 1100 can be considered to have constrictions at the locations indicated by D1, D2, D3, D4, D5, and D6 in Figure 2 when viewed from the Z-axis direction. Therefore, the thickness of the D1-D6 portions is dominant over the overall rigidity of the base 1100. Accordingly, the resonance frequency and thermal conductivity of the base 1100 should be examined based on vibration data, heat generation data, etc., generated from the measurement target 2000, and the thickness of the D1-D6 portions should be appropriately determined based on the results of the examination.

[0025] The length of the first projection 1111 in the Y-axis direction is set so as not to hinder the free rotation of the first holding portion 1210. Similarly, the length of the second projection 1112 in the Y-axis direction is set so as not to hinder the free rotation of the second holding portion 1220. For example, when machining the base 1110 and the first holding portion 1210, the length of the first projection 1111 in the Y-axis direction is set so that the free rotation of the first holding portion 1210 is not hindered by errors in machining accuracy. The same applies to the second projection 1112.

[0026] Furthermore, as will be described later, if it is desired to intentionally restrict the rotation of the first holding portion 1210, the length of the first protrusion 1111 in the Y-axis direction should be determined by further considering predetermined information. The same applies to the second protrusion 1112. The predetermined information includes information on how much the first protrusion 1111 deforms, and information on the weight of the first protrusion 1111 necessary to grip the first holding portion 1210 to the extent that its rotation can be restricted. For example, if the distance between the tip of the first protrusion 1111 and the first holding portion 1210 becomes too long, even if the first protrusion 1111 is intentionally deformed as will be described later, the tip of the first protrusion 1111 cannot be brought into contact with the first holding portion 1210. Furthermore, if the weight of the first protrusion 1111 is too light, even if the tip of the first protrusion 1111 is brought into contact with the first holding portion 1210, it will not be possible to generate a frictional force that balances the rotational force of the first holding portion 1210. In addition, it can be considered that the first protrusion 1111, by gripping the first holding portion 1210, restricts the rotation of the first holding portion 1210, and also lengthens the heat propagation path from the object to be measured 2000 to the physical quantity sensor 100. This is because, in addition to the first magnet 1310, the first holding portion 1210, and the peripheral portion 1102, the first protrusion 1111 is also considered to be interposed between the object to be measured 2000 and the physical quantity sensor 100. Similarly, the second protrusion 1112 gripping the second holding portion 1220 restricts the rotation of the second holding portion 1220, and it can be considered that the heat propagation path from the object to be measured 2000 to the physical quantity sensor 100 is lengthened.

[0027] Although not shown in the illustration, through holes may be formed in the upper edge portion 1102, the lower edge portion 1102, and the first projection portion 1111 through which the first axis S1 passes. In this way, as will be described later, the first screw 1410 can be inserted from the outside of the base 1100 toward the first holding portion 1210. This makes the first holding portion 1210 rotatable around the first screw 1410 inserted through the through hole in the first holding portion 1210. Similarly, through holes may be formed in the upper edge portion 1102, the lower edge portion 1102, and the second projection portion 1112 through which the second axis S2 passes.

[0028] In this embodiment, it is desirable that the first holding portion 1210 be formed using a material with low thermal conductivity. This minimizes the propagation of heat from the object to be measured 2000 to the physical quantity sensor 100. The material with low thermal conductivity may be, for example, a ceramic or a resin. More specifically, the first holding portion 1210 may be formed of a ceramic, also known as an oxide ceramic, such as zirconia or mullite, or a resin, also known as a super engineering plastic, such as polyamide-imide or polyetheretherketone. These materials should be appropriately selected considering processability, cost, weight, etc. The same applies to the second holding portion 1220.

[0029] The first magnet 1310 is made from a material such as a neodymium magnet, alnico magnet, or ferrite magnet, and is processed and formed into a rectangular parallelepiped shape. Furthermore, the first magnet 1310 may be formed by adding a chamfering process. The direction of the magnetic poles can be arbitrary. The same applies to the second magnet 1320.

[0030] Furthermore, as mentioned above, since the object to be measured 2000 contains a ferromagnetic material on its surface, the first magnet 1310 is attracted to the object to be measured 2000 via the first adsorption surface 1311, as shown in Figure 3. Similarly, the second magnet 1320 is attracted to the object to be measured 2000 via the second adsorption surface 1322. Also, as shown in Figure 4, since the first magnet 1310 is formed along the Y axis, the first adsorption surface 1311 is a surface parallel to the Y axis, i.e., the first axis S1. Therefore, as the first magnet 1310 rotates around the first axis S1, the first adsorption surface 1311 also rotates around the first axis S1. Similarly, since the second magnet 1320 is formed along the Y axis, the second adsorption surface 1312 is a surface parallel to the Y axis, i.e., the second axis S2. Therefore, as the second magnet 1320 rotates around the second axis S2, the second adsorption surface 1322 also rotates around the second axis S2. This allows the first suction surface 1311 and the second suction surface 1322 to be easily displaced by the rotation of the first axis S1 and the second axis S2.

[0031] As described above, this embodiment relates to a mounting device 1000 for attaching a physical quantity sensor 100 to a measurement target 2000. The mounting device 1000 includes a frame-shaped base 1100, a first holding part 1210, a second holding part 1220, a first magnet 1310, and a second magnet 1320. The base 1100 mounts the physical quantity sensor 100 and has a peripheral edge 1102 surrounding an opening. The first holding part 1210 is positioned inside the opening when viewed in the opening direction and rotates around a first axis S1 perpendicular to the opening direction. The second holding part 1220 is positioned inside the opening when viewed in the opening direction and rotates around a second axis S2 parallel to the first axis S1. The first magnet 1310 is held by the first holding part 1210 and is attracted to the measurement target 2000. The second magnet 1320 is held by the second holding part 1220 and is attracted to the object to be measured 2000.

[0032] As described above, the mounting device 1000 of this embodiment has a frame-shaped base 1100, so that the physical quantity sensor 100 can be attached to the base 1100. Furthermore, since the mounting device 1000 includes a first magnet 1310 and a second magnet 1320 arranged in the opening of the base 1100, the measurement target 2000 can be attracted to the magnet, thereby attaching the measurement target 2000 to the base 1100. This allows the physical quantity sensor 100 to measure the physical quantity of the measurement target 2000 via the base 1100. In addition, since the first magnet 1310 is held by the first holding part 1210, and the first holding part 1210 rotates around the first axis S1, the first magnet 1310 can be attracted to measurement targets 2000 of a wider variety of shapes, and the mounting device 1000 can be constructed such that the first holding part 1210 receives heat generated from the measurement target 2000 via the first magnet 1310. This enables the physical quantity sensor 100 to measure a larger number of measurement targets 2000, and suppresses the propagation of heat from the measurement targets 2000 to the physical quantity sensor 100. Furthermore, since the second magnet 1320 is held by the second holding part 1220, and the second holding part 1220 rotates around the second axis S2, the symmetry of the mounting device 1000 is improved, thereby synergistically enhancing the above-mentioned effects. This improves the reliability of the physical quantity measurement data acquired by the physical quantity sensor 100.

[0033] Furthermore, the method of this embodiment may be implemented by a physical quantity detection device 10. That is, the physical quantity detection device 10 of this embodiment includes the mounting device 1000 described above and the physical quantity sensor 100. By doing so, the same effects as described above can be obtained.

[0034] The physical quantity detection device 10 configured in this way achieves the above-described effects, making it possible to obtain highly reliable measurement data for, for example, a highly heat-generating object 2000. As a result, the physical quantity detection device 10 of this embodiment can be applied to applications such as machine health monitoring (MHM), structural health monitoring (SHM), and condition-based maintenance (CBM).

[0035] Furthermore, in the mounting device 1000 of this embodiment, the first holding portion 1210 and the second holding portion 1220 may be made of a resin material. By doing so, it is possible to construct a mounting device 1000 that includes the first holding portion 1210 and the second holding portion 1220 made of a specific material that suppresses heat propagation from the object to be measured 2000.

[0036] Furthermore, in the mounting device 1000 of this embodiment, the base 1100 may have a pair of first protrusions 1111 that project from the peripheral edge 1102 in a direction toward each other along the first axis S1 when viewed in the opening direction, and a pair of second protrusions 1112 that project from the peripheral edge 1102 in a direction toward each other along the second axis S2 when viewed in the opening direction. Also, the first holding part 1210 may be rotatably supported around the first axis S1 by the pair of first protrusions 1111, and the second holding part 1220 may be rotatably supported around the second axis S2 by the pair of second protrusions 1112. In this way, a mounting device 1000 can be constructed in which the rotational movement of the first holding part 1210 and the second holding part 1220 can be controlled.

[0037] Furthermore, in the mounting device 1000 of this embodiment, the first magnet 1310 may have a first adsorption surface 1311 parallel to the first axis S1, and the second magnet 1320 may have a second adsorption surface 1322 parallel to the second axis S2. In this way, the first magnet 1310 can be suitably attracted to the measurement target 2000 having a portion parallel to the first axis S1 via the first adsorption surface 1311. Similarly, the second magnet 1320 can be suitably attracted to the measurement target 2000 having a portion parallel to the second axis S2 via the second adsorption surface 1322.

[0038] Thus, in the mounting device 1000 of this embodiment, the first suction surface 1311 may be the surface on which the first holding part 1210 is attracted to the object to be measured 2000 by rotating around the first axis S1, and the second suction surface 1322 may be the surface on which the second holding part 1220 is attracted to the object to be measured 2000 by rotating around the second axis S2. In this way, the first magnet 1310 and the second magnet 1320 can be suitably attracted to a cylindrical object to be measured 2000 having a central axis parallel to the first axis S1 and the second axis S2. More specifically, for example, if the radius of the object to be measured 2000 changes, the curvature of the side surface of the object to be measured 2000 also changes, so the angle of the first suction surface 1311 for the first magnet 1310 to suitably attract to the object to be measured 2000 changes in a cross-sectional view perpendicular to the Y axis. Similarly, if the radius of the object to be measured 2000 changes, the angle of the second adsorption surface 1322 for the second magnet 1320 to be suitably adsorbed to the object to be measured 2000 in a cross-sectional view perpendicular to the Y-axis also changes. In this respect, by applying the method of this embodiment, the first adsorption surface 1311 rotates around the first axis S1, so the angle suitable for adsorption can be easily adjusted with respect to the shape of the object to be measured 2000. Similarly, by applying the method of this embodiment, the second adsorption surface 1322 rotates around the second axis S2, so the angle suitable for adsorption can be easily adjusted with respect to the shape of the object to be measured 2000. This makes it possible to suitably attach the mounting device 1000 to a wider variety of objects to be measured 2000.

[0039] Figures 6 and 7 illustrate the method of fixing the first retaining part 1210 to the first protrusion 1111 using the first screw 1410. Here, "the first retaining part 1210 is fixed to the first protrusion 1111" means that the rotational movement of the first retaining part 1210 is intentionally restricted by the first protrusion 1111. Although Figures 6 and 7 only illustrate the example of fixing the first retaining part 1210 to the first protrusion 1111 with the first screw 1410, the case in which the second retaining part 1220 is fixed to the second protrusion 1112 using the second screw 1420 is similar and therefore omitted from the illustration. Similarly, "the second retaining part 1220 is fixed to the second protrusion 1112" means that the rotational movement of the second retaining part 1220 is intentionally restricted by the second protrusion 1112. Furthermore, to simplify the explanation, the peripheral portion 1102 is omitted in Figures 6 and 7.

[0040] Figure 6 is a schematic diagram showing the through holes provided in each part of the base 1100, based on the BB cross-sectional view of Figure 2. The through hole provided in the positive-side first projection 1111, shown at D21, is threaded. In contrast, the through hole in the first retaining part 1210, shown at D22, and the through hole in the negative-side first projection 1111, shown at D23, are not threaded. In other words, the through hole in the first retaining part 1210 and the through hole in the negative-side first projection 1111 are through holes. Furthermore, in the first screw 1410, the location shown at D24 is threaded so that screw fastening is possible between it and the through hole shown at D21.

[0041] When viewed in a YZ cross-sectional view of the first projection 1111, the first retaining portion 1210, and their through holes, as shown in B21 of Figure 6, the through hole of the positive-side first projection 1111 is threaded.

[0042] Figure 7 is a diagram illustrating the control of the rotational movement of the first retaining part 1210, based on the BB cross-sectional view in Figure 2. D30 in Figure 7 shows a situation assuming that the first screw 1410 is not inserted into the base 1100. In this situation, the length of the opening between the first protrusions 1111 in the Y-axis direction is assumed to be the length shown in D31. In other words, if the opening in the Y-axis direction is the length shown in D31, there is enough clearance for the first retaining part 1210 to rotate freely in the direction shown in D32.

[0043] Then, the first screw 1410 is inserted in the following order when viewed from the negative side of the Y-axis: through hole in the negative side first protrusion 1111, through hole in the first retaining part 1210, and through hole in the positive side first protrusion 1111. More specifically, the first screw 1410 passes through the through hole in the first retaining part 1210, which is a through hole, and the through hole in the negative side first protrusion 1111, and the threaded portion at the tip of the first screw 1410 comes into contact with the threaded portion of the through hole in the positive side first protrusion 1111. At this point, the head of the first screw 1410 has not yet come into contact with the wall surface of the screw hole in the base 1100. Therefore, even when the first screw 1410 is tightened, the first screw 1410 only advances in the positive side of the Y-axis until the head of the first screw 1410 comes into contact with the wall surface of the screw hole in the base 1100. In other words, until the head of the first screw 1410 contacts the wall surface of the screw hole in the base 1100, no compressive force is generated in the first projection 1111, and the length of the opening in the Y-axis direction remains the length shown in D31, thus maintaining the state in which the first holding part 1210 can rotate freely in the direction shown in D32.

[0044] Subsequently, the state shown at D40 in Figure 7 is reached. More specifically, as shown at D41, the head of the first screw 1410 comes into contact with the wall surface of the screw hole in the base 1100. In the state shown at D40, further tightening of the first screw 1410 generates a compressive force on the first projection 1111 due to the head of the first screw 1410 and the threaded portion at the tip of the first screw 1410, causing the first projection 1111 to deform and narrow the opening. As a result, the state shown at D50 in Figure 7 is reached. D50 indicates that the distance in the Y-axis direction of the opening is the distance shown at D51. The distance shown at D51 is shorter than the distance shown at D31. In this way, by tightening the first screw 1410, the opening between the first projections 1111 is reduced, the first retaining part 1210 is strongly gripped by the first projections 1111, and a frictional force is generated between the first retaining part 1210 and the first projections 1111. This restricts the rotational movement of the first holding part 1210 in the direction indicated by D32.

[0045] In other words, in order to maintain the state in which the first holding part 1210 (and the first magnet 1310 held therein) can rotate freely using the first screw 1410, the first screw 1410 should be inserted through the screw hole of the base 1100 and tightened to the extent that the head of the first screw 1410 does not come into contact with the side surface of the screw hole. When attaching the mounting device 1000 to the object to be measured 2000, the rotation of the first holding part 1210 (and the first magnet 1310 held therein) is restricted by further tightening the first screw 1410 after determining the optimal angle of the first suction surface 1311, thereby allowing the mounting device 1000 to be attached to the object to be measured 2000 more stably.

[0046] From the above, the mounting device 1000 of this embodiment further includes a first screw 1410 provided along the first axis S1, which allows the first retaining portion 1210 to rotate around the first axis S1 with respect to a pair of first protrusions 1111, and a second screw 1420 provided along the second axis S2, which allows the second retaining portion 1220 to rotate around the second axis S2 with respect to a pair of second protrusions 1112. In this way, a mounting device 1000 can be constructed in which the rotational movement of the first retaining portion 1210 and the second retaining portion 1220 can be intentionally controlled using the first screw 1410 and the second screw 1420.

[0047] Furthermore, in the mounting device 1000 of this embodiment, the first retaining portion 1210 may be fixed to the pair of first protrusions 1111 by tightening the first screw 1410, and the second retaining portion 1220 may be fixed to the pair of second protrusions 1112 by tightening the second screw 1420. By doing so, the propagation of heat from the object to be measured 2000 to the physical quantity sensor 100 can be further suppressed, and the rotational movement of the first retaining portion 1210 and the second retaining portion 1220 can be controlled. This further improves the convenience of the mounting device 1000. For example, in order to accommodate the object to be measured 2000 which can take on various shapes, it is desirable that the first retaining portion 1210 and the second retaining portion 1220 of the mounting device 1000 be in a state where they can rotate freely before being attached to the object to be measured 2000. On the other hand, after the mounting device 1000 is attached to the object to be measured 2000, it is desirable to restrict the rotation of the first holding part 1210 and the second holding part 1220 so that the mounting device 1000 can stably hold the object to be measured 2000. In this respect, by applying the method of this embodiment, the first holding part 1210 and the second holding part 1220 can be freely controlled to switch between a state where rotation is freely permitted and a state where rotation is restricted, thereby further improving the convenience of the mounting device 1000. Furthermore, as mentioned above, since the first holding part 1210 is fixed to the pair of first protrusions 1111, the heat propagation path from the object to be measured 2000 to the physical quantity sensor 100 is lengthened, thus further suppressing the propagation of heat from the object to be measured 2000 to the physical quantity sensor 100. Similarly, by fixing the second holding portion 1220 to the pair of second protrusions 1112, the heat propagation path from the object to be measured 2000 to the physical quantity sensor 100 is lengthened, thereby further suppressing heat propagation from the object to be measured 2000 to the physical quantity sensor 100.

[0048] Furthermore, as shown in Figure 8, for example, at D60, the first magnet 1310 may be held in the first holding part 1210 by screw fastening. Note that D60 in Figure 8 is an example where the first adsorption surface 1311 is parallel to the X-axis. For example, as shown in Figure 8, at D61, the first holding part 1210 has a screw hole, and as shown in D62, the first magnet 1310 also has a screw hole. The first magnet fixing screw 1510 then moves in a direction parallel to the Z-axis, fixing the first holding part 1210 and the first magnet 1310. Note that the first magnet fixing screw 1510 shown in Figure 8 does not limit the specific structure of the first magnet fixing screw 1510 in any way and can be determined as appropriate. Also, although only a male screw is shown for the first magnet fixing screw 1510 in Figure 8, it may also include a female screw, which is not shown. In this way, the first magnet 1310 is firmly fixed to the first retaining part 1210 by screw fastening, thus reducing the possibility of the first magnet 1310 detaching from the first retaining part 1210.

[0049] Furthermore, the first holding portion 1210 may further have a first restricting portion 1211, as shown in Figure 8. For example, if the mounting device 1000 continues to be used after the first holding portion 1210 and the first magnet 1310 are screw-fastened as described above, the first magnet 1310 may rotate in the direction shown in D63 due to the loosening of the first magnet fixing screw 1510, etc. The direction shown in D63 coincides with the rotation direction of the first magnet fixing screw 1510. In this respect, by applying the method of this embodiment, even if the first magnet 1310 tries to rotate in the direction shown in D63, the rotational movement of the first magnet 1310 is restricted by the first restricting portion 1211.

[0050] Similarly, as shown in B70 of Figure 8, the second retaining part 1220 and the second magnet 1320 may be fixed by the second magnet fixing screw 1520. For example, as shown in D71 of Figure 8, the second retaining part 1220 has a screw hole, and as shown in D72, the second magnet 1320 has a screw hole. In this way, the second magnet 1320 is firmly fixed by the second retaining part 1220 by screw fastening. Also, similarly, the second retaining part 1220 may further have a second restricting part 1222. In this way, it is possible to prevent the second magnet 1320 from rotating in the direction shown in B73 due to loosening of the second magnet fixing screw 1520, etc. The direction shown in D73 coincides with the rotation direction of the second magnet fixing screw 1520.

[0051] As described above, in the mounting device 1000 of this embodiment, the first magnet 1310 is fixed to the first holding part 1210 by the first magnet fixing screw 1510, and the second magnet 1320 is fixed to the second holding part 1220 by the second magnet fixing screw 1520. Furthermore, the first holding part 1210 has a first restricting part 1211 that restricts the first magnet 1310 from rotating in the rotational direction of the first magnet fixing screw 1510, and the second holding part 1220 has a second restricting part 1222 that restricts the second magnet 1320 from rotating in the rotational direction of the second magnet fixing screw 1520. In this way, the displacement of the first magnet 1310 and the second magnet 1320 can be further suppressed. As a result, the mounting device 1000 can be attached to the measurement target 2000 in a more stable state.

[0052] Furthermore, the attachment and detachment of the base 1100 and the physical quantity sensor 100 may be achieved, for example, by having a fixing part 1120 on the 1100. Figure 9 is a perspective view of Figure 1 with the physical quantity sensor 100 removed for convenience in order to explain the fixing part 1120. Note that in Figure 9, the components other than the fixing part 1120 of the base 1100 have already been described, so the reference numerals have been omitted as appropriate.

[0053] The fixing portion 1120 specifically includes, for example, screw holes 1121, 1122, and 1123. Screw holes 1121 and 1122 are formed on the left-hand periphery 1102, and screw hole 1123 is formed on the right-hand periphery 1102. In other words, screw holes 1121 and 1122 are formed on one of the two sides of the periphery 1102 that are aligned with the first axis S1, and screw hole 1123 is formed on the other of the two sides of the periphery 1102 that are aligned with the first axis S1. By doing so, the distance from the first magnet 1310 to the fixing part 1120 becomes longer, which in turn lengthens the heat propagation path from the object to be measured 2000 (the heat propagation path flowing in the order of object to be measured 2000, the first magnet 1310, the first holding part 1210, the first protrusion 1111, the peripheral part 1102, and the fixing part 1120). Similarly, the distance from the second magnet 1320 to the fixing part 1120 becomes longer, which in turn lengthens the heat propagation path from the object to be measured 2000 (the heat propagation path flowing in the order of object to be measured 2000, the second magnet 1320, the second holding part 1220, the second protrusion 1112, the peripheral part 1102, and the fixing part 1120).

[0054] Then, in an XY plane view, align the position of screw hole 1121 in Figure 9 with the position of screw hole 121 of the physical quantity sensor 100 shown in Figure 1 or Figure 10, align the position of screw hole 1122 in Figure 9 with the position of screw hole 122 of the physical quantity sensor 100 shown in Figure 1, and align the position of screw hole 1123 in Figure 9 with the position of screw hole 123 of the physical quantity sensor 100 shown in Figure 10. Then, tighten screw hole 121 with screw hole 1121 using a screw not shown, tighten screw hole 122 with screw hole 1122 using a screw not shown, and tighten screw hole 123 with screw hole 1123 using a screw not shown.

[0055] In the physical quantity sensor 100, the bottom surface of a predetermined area including screw holes 121, 122, and 123 is configured to be lower than the bottom surface of the area outside the predetermined area. In other words, when the physical quantity sensor 100 is fixed to the base 1100, only the predetermined area including screw holes 121, 122, and 123 is fixed to the base 1100. As a result, as shown in Figure 1, the physical quantity sensor 100 and the base 1100 are fixed such that a gap is formed between the area of ​​the physical quantity sensor 100 outside the predetermined area and the base 1100. This allows the heat propagation path described above to be established. Thus, in the mounting device 1000 of this embodiment, the base 1100 has fixing parts 1120 for fixing the physical quantity sensor 100 at positions corresponding to two sides of the peripheral edge 1102 that are along the first axis S1. In this way, the physical quantity sensor 100 can be stably fixed to the mounting device 1000, and the propagation of heat from the object to be measured 2000 to the physical quantity sensor 100 can be suppressed.

[0056] As described above, this embodiment relates to a mounting device for attaching a physical quantity sensor to a measurement target. The mounting device includes a base, a first holding part, a second holding part, a first magnet, and a second magnet. The base mounts the physical quantity sensor and has a peripheral edge surrounding an opening, and is frame-shaped. The first holding part is positioned inside the opening when viewed in the opening direction and rotates around a first axis perpendicular to the opening direction. The second holding part is positioned inside the opening when viewed in the opening direction and rotates around a second axis parallel to the first axis. The first magnet is held by the first holding part and is attracted to the measurement target. The second magnet is held by the second holding part and is attracted to the measurement target.

[0057] Thus, in the mounting device of this embodiment, the first magnet is held by the first holding part, and the first holding part rotates around the first axis. This allows the first magnet to be attracted to measurement targets of a wider variety of shapes, and enables the construction of a mounting device in which the first holding part receives heat generated from the measurement target via the first magnet. This makes it possible to measure a wider variety of measurement targets using the physical quantity sensor, and suppresses the propagation of heat from the measurement target to the physical quantity sensor. Furthermore, since the second magnet is held by the second holding part, and the second holding part rotates around the second axis, the symmetry of the mounting device is improved, which synergistically enhances the above-mentioned effects. This improves the reliability of the physical quantity measurement data acquired by the physical quantity sensor.

[0058] Furthermore, the first retaining part and the second retaining part may be made of a resin material.

[0059] In this way, a mounting device can be constructed that includes a first holding part and a second holding part made of a specific material that suppresses heat propagation from the object being measured.

[0060] Furthermore, the base may have a pair of first protrusions projecting from its periphery in a direction toward each other along the first axis when viewed in the opening direction, and a pair of second protrusions projecting from its periphery in a direction toward each other along the second axis when viewed in the opening direction. Also, the first holding part may be rotatably supported about the first axis by the pair of first protrusions, and the second holding part may be rotatably supported about the second axis by the pair of second protrusions.

[0061] In this way, a mounting device can be constructed that allows control over the rotational movement of the first and second holding parts.

[0062] The mounting device may further include a first screw provided along a first axis, which allows the first retaining portion to rotate around the first axis relative to a pair of first protrusions, and a second screw provided along a second axis, which allows the second retaining portion to rotate around the second axis relative to a pair of second protrusions.

[0063] In this way, a mounting device can be constructed that allows for the intentional control of the rotational movement of the first and second retaining parts using the first and second screws.

[0064] Alternatively, the first retaining portion may be fixed to a pair of first protrusions by tightening the first screw, and the second retaining portion may be fixed to a pair of second protrusions by tightening the second screw.

[0065] This method minimizes heat propagation from the object being measured and allows for control of the rotational movement of the first and second holding parts.

[0066] Furthermore, the base may have fixing portions for securing the physical quantity sensor at positions corresponding to two sides along the first axis on its peripheral edge.

[0067] This method allows the physical quantity sensor to be stably fixed to the mounting device, while also suppressing the propagation of heat from the object being measured to the physical quantity sensor.

[0068] Furthermore, the first magnet may be fixed to the first holding part by a first magnet fixing screw, and the second magnet may be fixed to the second holding part by a second magnet fixing screw. The first holding part may have a first restricting part that restricts the first magnet from rotating in the direction of rotation of the first magnet fixing screw, and the second holding part may have a second restricting part that restricts the second magnet from rotating in the direction of rotation of the second magnet fixing screw.

[0069] By doing so, the displacement of the first and second magnets can be further suppressed.

[0070] Furthermore, the first magnet may have a first adsorption surface parallel to the first axis, and the second magnet may have a second adsorption surface parallel to the second axis.

[0071] In this way, the first magnet can be suitably attracted to a measurement target having a portion parallel to the first axis via the first adsorption surface, and the second magnet can be suitably attracted to a measurement target having a portion parallel to the second axis via the second adsorption surface.

[0072] Furthermore, the first adsorption surface may be the surface that adheres to the object to be measured as the first holding part rotates around the first axis, and the second adsorption surface may be the surface that adheres to the object to be measured as the second holding part rotates around the second axis.

[0073] In this way, the first magnet and the second magnet can be suitably attracted to a cylindrical object to be measured that has a central axis parallel to the first and second axes.

[0074] Furthermore, this embodiment relates to a physical quantity detection device that includes the mounting device described above and a physical quantity sensor.

[0075] Although this embodiment has been described in detail above, it will be readily apparent to those skilled in the art that many modifications are possible without substantially departing from the novelty and effects of this disclosure. Therefore, all such modifications are included within the scope of this disclosure. For example, any term that appears at least once in the specification or drawings together with a broader or synonymous term may be replaced with that different term anywhere in the specification or drawings. Furthermore, all combinations of this embodiment and its modifications are also included within the scope of this disclosure. In addition, the configuration and operation of the mounting device and physical quantity detection device, etc., are not limited to those described in this embodiment, and various modifications are possible. [Explanation of Symbols]

[0076] 10...Physical quantity detection device, 100...Physical quantity sensor, 121,122,123...Screw holes, 1000...Mounting device, 1100...Base, 1102...Peripheral part, 1111...First protrusion, 1112...Second protrusion, 1120...Fixing part, 1121,1122,1123...Screw holes, 1210...First holding part, 1211...First restricting part, 1220...Second holding part, 1222...Second restricting part, 1310...First magnet, 1311...First adsorption surface, 1320...Second magnet, 1322...Second adsorption surface, 1410...First screw, 1420...Second screw, 1510...First magnet fixing screw, 1520...Second magnet fixing screw, 2000...Measurement target, S1...First axis, S2...Second axis

Claims

1. A mounting device for attaching a physical quantity sensor to a measurement target, A frame-shaped base having a peripheral edge surrounding the opening, which is equipped with the aforementioned physical quantity sensor, A first holding portion is positioned within the opening when viewed in the opening direction of the opening and rotates around a first axis perpendicular to the opening direction, A second holding portion is positioned within the opening when viewed in the direction of the opening and rotates around a second axis parallel to the first axis, The first magnet, which is held in the first holding part and attracted to the object to be measured, The second magnet, which is held in the second holding part and attracted to the object to be measured, A mounting device characterized by including the following:

2. In the mounting device described in claim 1, The mounting device is characterized in that the first retaining portion and the second retaining portion are made of a resin material.

3. In the mounting device described in claim 1, The aforementioned base is, Viewed in the direction of the opening, a pair of first protrusions project from the peripheral edge in a direction that approaches each other along the first axis, It has a pair of second protrusions that project from the peripheral edge in a direction toward each other along the second axis when viewed in the opening direction, The first retaining part is, It is supported so as to be rotatable around a first axis by a pair of first protrusions, The second retaining part is, A mounting device characterized by being rotatably supported about a second axis by a pair of second protrusions.

4. In the mounting device described in claim 3, A first screw provided along the first axis, which allows the first retaining portion to rotate around the first axis relative to the pair of first protrusions, A second screw is provided along the second axis, which allows the second retaining portion to rotate around the second axis relative to the pair of second protrusions, A mounting device characterized by including the following:

5. In the mounting device described in claim 4, When the first screw is tightened, the first retaining portion is fixed to the pair of first protrusions. An attachment device characterized in that the second retaining portion is fixed to the pair of second protrusions by tightening the second screw.

6. In the mounting device described in claim 1, The aforementioned base is, A mounting device characterized by having a fixing portion for fixing the physical quantity sensor at positions corresponding to two sides along the first axis on the peripheral edge.

7. In the mounting device described in claim 1, The first magnet is, The first magnet is fixed to the first holding part by the first magnet fixing screw, The second magnet is, The second magnet is fixed to the second holding part by the second magnet fixing screw, The first retaining part is, It has a first restricting part that restricts the first magnet from rotating in the rotational direction of the first magnet fixing screw, The second retaining part is, An attachment device characterized by having a second restricting part that restricts the rotation of the second magnet so as not to occur in the rotational direction of the second magnet fixing screw.

8. In the mounting device described in claim 1, The first magnet is, Having a first adsorption surface parallel to the first axis, The second magnet is, A mounting device characterized by having a second suction surface parallel to the second axis.

9. In the mounting device described in claim 8, The first adsorption surface is The first holding portion is a surface that adheres to the object to be measured by rotating around the first axis, The second adsorption surface is A mounting device characterized in that the second holding portion is a surface that adheres to the object to be measured by rotating around the second axis.

10. A mounting device as described in any one of claims 1 to 9, The aforementioned physical quantity sensor, A physical quantity detection device characterized by including [a specific component].

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