WO2016139893A1

WO2016139893A1 - Anemoscope

Info

Publication number: WO2016139893A1
Application number: PCT/JP2016/000636
Authority: WO
Inventors: 山崎　弘; 康友山野井
Original assignee: 株式会社デンソー
Priority date: 2015-03-05
Filing date: 2016-02-08
Publication date: 2016-09-09
Also published as: JP2016161549A; JP6384364B2

Abstract

This anemoscope is provided with a fixed portion (20, 50) a movable portion (10, 40), a magnet (30, 31, 32) and a magnetic sensor (35 to 37). The movable portion (10, 40) is attached to the fixed portion in such a way as to be capable of rotating around a first axis of rotation and around a second axis of rotation orthogonal to the first axis of rotation, in order for the movable portion (10, 40) to face in an upwind direction. The magnet (30, 31, 32) is disposed on the movable portion and generates a magnetic field. The magnetic sensor (35 to 37) is disposed in such a way as to oppose the magnet, detects the magnetic field generated by the magnet, and outputs a signal for identifying a horizontal component and a vertical component of the wind direction.

Description

Anemometer

Cross-reference of related applications

This application is based on Japanese Patent Application No. 2015-043780 filed on Mar. 5, 2015, the disclosure of which is incorporated herein by reference.

This disclosure relates to anemometers.

As a measuring instrument for measuring the wind direction, there is a wind direction anemometer provided with a blade fixing plate, a pair of blades, a plurality of magnets, and a bearing magnet (for example, see Patent Document 1). The blade fixing plate rotates so that the tip end portion faces the windward side. The support portion rotatably supports the blade fixing plate. The pair of blades are openable and closable, and are attached to both ends of the blade fixing plate. The plurality of magnets gives a repulsive force in the direction in which the pair of blades open. The compass is provided on the support.

JP 2006-292540 A Japanese Patent Laid-Open No. 2001-215241

In recent years, in order to improve exhaust gas purification performance of automobile driving engines, as a driving engine, an engine of an exhaust gas exhaust port provided at the front of the vehicle has changed to an engine of an exhaust gas exhaust port provided at the rear of the vehicle. is there. For this reason, in the engine room, heat is exhausted from the engine exhaust pipe or the like to the vehicle rear side of the engine, and this exhausted heat may cause problems in the equipment in the engine room. As a countermeasure, there is a desire to improve the air flow in the engine room and improve the cooling performance in the engine room.

Therefore, in order to analyze the air flow in the engine room where the engine of the type that provides the exhaust gas exhaust port at the rear of the vehicle is analyzed, an anemometer that measures the wind direction in the engine room even when the hood of the automobile is closed is required. ing.

However, the wind direction anemometer described in the above-mentioned Patent Document 1 has a blade fixing plate that rotates in the horizontal direction so that the tip portion is directed to the windward direction, and the direction of the blade fixing plate and the direction of the wind are visually observed by a compass magnet. It is a configuration to check. For this reason, for example, it is impossible to measure both the horizontal component and the vertical component of the wind direction by installing in a narrow space such as in the engine room with the hood closed.

Moreover, as such an anemometer, it has a rotating shaft extending in the vertical direction and a horizontal axis extending in the horizontal direction, detects the horizontal component and the vertical component of the wind direction, and is configured by using a magnet and a coil. There is also one in which the wind speed is measured by a detector (see, for example, Patent Document 2). However, this wind direction anemometer uses a magnet and a coil for the wind direction vertical component detector and the wind direction vertical component detector. Therefore, it is difficult to reduce the size of the anemometer. For example, it is difficult to install the anemometer in a narrow space such as in an engine room with the hood closed.

The present disclosure has been made in view of the above points, and an object thereof is to provide an anemometer that can be installed in a narrow space and can measure both a horizontal component and a vertical component of a wind direction.

The anemometer of the present disclosure includes a fixed part, a movable part, a magnet, and a magnetic sensor. The movable part is attached to the fixed part so as to be rotatable around the first rotation axis and around the second rotation axis orthogonal to the first rotation axis so as to face the windward direction. The magnet is disposed on the movable part and generates a magnetic field. The magnetic sensor is arranged to face the magnet, detects a magnetic field generated by the magnet, and outputs a signal for specifying a horizontal component and a vertical component of the wind direction.

According to the anemometer of the present disclosure, the movable portion is fixed to be rotatable about the first rotation axis and the second rotation axis orthogonal to the first rotation axis so as to face the windward direction. Is attached. A magnet that generates a magnetic field is disposed in the movable part. In addition, a magnetic sensor that detects a magnetic field generated by the magnet and outputs a signal for specifying a horizontal component and a vertical component of the wind direction is disposed so as to face the magnet. Thereby, the anemometer of this indication can be installed in a narrow space, and can measure both the horizontal component and the vertical component of the wind direction.

The above and other objects, features, and advantages of the present disclosure will become more apparent from the following detailed description with reference to the accompanying drawings.
It is an external view of the anemometer which concerns on 1st Embodiment. It is a top view of the anemometer which concerns on 1st Embodiment. FIG. 3 is a sectional view taken along line III-III shown in FIG. 2. FIG. 4 is a sectional view taken along line IV-IV shown in FIG. 2. It is a top view of the magnetic sensor which concerns on 1st Embodiment. It is a figure for demonstrating arrangement | positioning of the spherical magnet which concerns on 1st Embodiment, and a magnetic sensor. It is the figure which showed the relationship between the rotation angle of the horizontal direction of the spherical magnet which concerns on 1st Embodiment, and the A phase output and B phase output of a magnetic sensor. It is a figure for demonstrating the A phase output and B phase output of a magnetic sensor when the rotating shaft of the spherical magnet which concerns on 1st Embodiment inclines to the left side. It is a figure for demonstrating the A phase output and B phase output of a magnetic sensor when the rotating shaft of the spherical magnet which concerns on 1st Embodiment inclines to the right side. It is a block block diagram of the anemometer which concerns on 1st Embodiment. It is an external view of the anemometer which concerns on 2nd Embodiment. It is a front view of the anemometer which concerns on 2nd Embodiment. FIG. 12 is a cross-sectional view taken along line XII-XII in FIG. FIG. 12 is a cross-sectional view taken along line XIII-XIII in FIG. It is a figure for demonstrating arrangement | positioning of the cylindrical magnet and magnetic sensor which concern on 2nd Embodiment. It is a figure for demonstrating a modification.

Hereinafter, embodiments of the present disclosure will be described with reference to the drawings. In the following embodiments, portions that are the same or equivalent to each other may be denoted by the same reference numerals in the drawings, and redundant description may be omitted. When only a part of the configuration is described in each embodiment, the other parts of the configuration are the same as those of the embodiment described above. In addition to the combination of parts specifically described in each embodiment, the embodiments may be partially combined as long as the combination does not hinder.

(First embodiment)
An anemometer according to the first embodiment will be described with reference to FIGS. The anemometer of the present embodiment is used as a sensor that measures the wind direction in an engine room (measurement space) of an automobile, for example. The anemometer is configured as a small omnidirectional anemometer capable of simultaneously measuring the wind direction, wind speed, and temperature. As shown in FIG. 1, the anemometer has a fixed portion 20 and a movable portion 10.

The fixing unit 20 includes a fixing stage 21 and a support member 22. The fixed stage 21 and the support member 22 are each integrally formed of resin.

The fixed stage 21 corresponds to a bottom plate part serving as a base, and the upper surface is substantially square. One side of the upper surface of the fixed stage 21 is about 20 mm. The height from the bottom surface of the fixed stage 21 to the upper end of the movable part 10 is about 24 millimeters.

As shown in FIG. 2, mounting screw holes 211 are formed at four corners of the fixed stage 21. As shown in FIGS. 3 and 4, an opening 21 a is formed on the bottom side of the fixed stage 21, and a circuit board 80 on which a control unit 81 and the like to be described later are mounted is stored in the opening 21 a. Yes. The circuit board 80 is provided with connector terminals 80a. A cover 21c is attached to the opening 21a.

An opening hole 21 b penetrating the side surface of the fixed stage 21 is formed on the side surface on the back surface side of the fixed stage 21. Connector terminals 80a mounted on the circuit board 80 are exposed to the outside through the opening holes 21b. A connection line (not shown) for connecting to the power source is connected to the connector terminal 80a. Power is supplied from the vehicle via this connection line.

The support member 22 has a substantially cylindrical shape, and extends in the vertical direction from the central portion of the upper surface of the fixed stage 21 toward the movable portion 10. Inside the support member 22, a hollow portion 22a extending in the axial direction and a magnetic sensor storage portion 22b for storing the magnetic sensor 35 are formed.

In the hollow portion 22a, a connection line 25a for connecting the magnetic sensor 35 and the circuit board 80 is disposed. A magnetic sensor 35 is stored in the magnetic sensor storage unit 22b. A protrusion 220 for supporting a U-shaped member 13 of the movable portion 10 to be described later is formed at the tip of the support member 22.

Further, a wind speed sensor 60 and a temperature sensor 61 are provided at corners located at both ends of the front side of the fixed stage 21, respectively. The front side means the side opposite to the connector terminal 80a with respect to the support member 22 in the direction in which the side of the fixed stage 21 where the connector terminal 81a is disposed and the side facing the side are aligned. That is, the wind speed sensor 60 and the temperature sensor 61 are disposed at both ends of the side opposite to the side where the connector terminal 81a is disposed.

In the present embodiment, the direction in which the side of the fixed stage 21 where the connector terminal 81a is arranged and the side opposite to the side is referred to as the front-rear direction. It is assumed that the connector terminal 81a is disposed behind the support member 22 in the front-rear direction. In addition, the direction in which the remaining two sides of the fixed stage 21 are aligned is referred to as the left-right direction. However, the front, back, left, and right directions do not limit the actual mounting direction.

The wind speed sensor 60 is constituted by a hot-wire omnidirectional anemometer. The hot-wire anemometer obtains the wind speed from the temperature when the heating wire is exposed to the environment and energized, and the heat generated in the heating wire and the cooling by the wind are balanced. As a result, the anemometer can accurately measure the wind speed without depending on the wind direction. The wind speed sensor 60 detects the wind speed and outputs a signal indicating the detected wind speed to the control unit 81.

The temperature sensor 61 detects the ambient temperature and outputs a signal indicating the detected temperature to the control unit 81. The temperature sensor 61 can be configured using, for example, a thermocouple, a thermistor, or the like.

The movable part 10 includes a movable member 110 having a body part 111 and a blade part 112, and a U-shaped member 13. The movable unit 10 is supported by the support member 22 of the fixed unit 20.

The U-shaped member 13 is supported by the support member 22 of the fixed portion 20 so as to be rotatable around a first rotation axis (vertical axis) extending in the vertical direction. Specifically, the bottom surface of the U-shaped member 13 is formed with a hole portion 130 that fits into the protrusion 220 formed on the support member 22 of the fixed portion 20. By fitting the protrusion 220 into the hole 130, the U-shaped member 13 can rotate around the vertical axis.

The U-shaped member 13 can turn the movable member 110 about a second rotation axis (horizontal axis) orthogonal to the first rotation axis so as to sandwich the body portion 111 of the movable member 110 from both sides. To support. The U-shaped member 13 has two through holes 131 through which the male screw member 13a for rotatably supporting the body portion 111 is inserted. The male screw member 13 a is inserted into each through hole 131 formed in the U-shaped member 13 and then tightened into a screw hole portion (not shown) formed on the side surface of the body portion 111 of the movable member 110. Thus, the movable member 110 is supported by the U-shaped member 13 so as to be rotatable around the horizontal axis.

The body portion 111 is made of resin, and has a rounded tip portion 111 a and a magnet storage portion 111 b that stores the spherical magnet 30. The magnet storage unit 111b stores a spherical magnet 30 that is magnetized in two hemispheres, S pole and N pole.

Since the balance of the body part 111 affects the measurement of the vertical component of the wind direction, the body part 111 needs to be horizontal when there is no wind. For this reason, the spherical magnet 30 is disposed at a position that is the center of gravity of the movable member 110, that is, a position that is the center of balance between the front, rear, left, and right of the movable member 110. The spherical magnet 30 is stored in the magnet storage unit 111b so that the boundary between the S pole and the N pole is orthogonal to the upper surface (detection surface) of the magnetic sensor 35 in a state where the body unit 111 is in a horizontal state. Has been.

The blade portion 112 has a thin plate-like horizontal blade (second plate member) 112a extending in the horizontal direction and a plurality of thin plate-like vertical blades (first plate member) 112b extending from the horizontal blade 112a in the vertical direction. It is fixed to the upper surface of the body part 111.

Next, the operation of the anemometer of this embodiment will be described. The anemometer is installed such that the upper surface of the fixed stage 21 is horizontal with respect to the installation surface. Since the spherical magnet 30 is disposed at a position that becomes the center of gravity of the movable member 110, the body portion 111 is horizontal in a windless state.

When the wind direction meter receives wind from the horizontal direction, the body portion 111 rotates around the vertical axis so that the front end portion 111a faces upwind while the body portion 111 is maintained in a horizontal state. At this time, the spherical magnet 30 also rotates around the vertical axis together with the body portion 111.

Or, for example, when the anemometer receives wind from an obliquely upward direction, the body portion 111 rotates about the horizontal axis so that the tip 111a moves upward in the vertical direction and faces the windward direction. At this time, the spherical magnet 30 is also rotated around the horizontal axis together with the body portion 111.

Or, for example, when the anemometer receives wind from an obliquely downward direction, the trunk portion 111 rotates about the horizontal axis so that the tip 111a moves downward in the vertical direction and faces upwind. At this time, the spherical magnet 30 is also rotated around the horizontal axis together with the body portion 111.

The anemometer according to the present embodiment includes a spherical magnet 30 stored in the magnet storage portion 111 b of the body portion 111 and a magnetic sensor 35 disposed on the support member 22 so as to face the spherical magnet 30. ing. The magnetic sensor 35 is a rotation angle sensor that detects a rotation angle of the spherical magnet 30 by detecting a magnetic field generated by the spherical magnet 30 in a non-contact manner. The spherical magnet 30 and the magnetic sensor 35 are arranged so as to be aligned in the extending direction (vertical direction) of the support member 22. The distance in the vertical direction between the spherical magnet 30 and the magnetic sensor 35 is shorter than the distance in the vertical direction between the magnetic sensor 35 and the fixed stage 21. In other words, the magnetic sensor 35 is located between the spherical magnet 30 and the fixed stage 21 in the vertical direction.

The magnetic sensor 35 of this embodiment is configured by patterning a thin film (thin film ferromagnetic metal) made of an alloy mainly composed of a ferromagnetic metal such as Ni (nickel) or Fe (iron) on a glass substrate. ing. This ferromagnetic metal thin film has a characteristic that the resistance value changes depending on the strength of the external magnetic field in a specific direction.

The magnetic sensor 35 of this embodiment forms a waveform of a full-bridge circuit in which four ferromagnetic metal thin films formed on a glass substrate plane are formed in a bridge shape, and a voltage waveform output from the full-bridge circuit. It is configured as an IC-type AMR (Anisotropic-Magneto-Resistive) sensor in which a waveform shaping circuit (none of which is shown) is configured as one chip. Such an IC type AMR sensor is a known sensor, and for example, KG-1402-61 (type name) manufactured by Hamamatsu Photoelectric Co., Ltd. can be used.

FIG. 5 is a top view of the magnetic sensor 35. The magnetic sensor 35 has a rectangular parallelepiped shape. The magnetic sensor 35 is arranged such that the center line L in the longitudinal direction faces a predetermined direction (for example, the front of the anemometer). On the bottom surface of the magnetic sensor 35, there are provided two power supply terminals VCC, two ground terminals GND, a pair of A-phase output terminals + A and -A, and a pair of B-phase output terminals + B and -B. Yes.

The magnetic sensor 35 is mounted on a circuit board (not shown). This circuit board is connected to the circuit board 80 via the connection line 25a shown in FIG. A DC constant voltage is applied to each power supply terminal VCC from the circuit board 80 via the connection line 25a. Each ground terminal GND is grounded via a circuit board 80. Further, the A-phase output terminals + A and -A and the B-phase output terminals + B and -B are connected to the control unit 81 mounted on the circuit board 80 via connection lines 25a.

As shown in FIG. 6, the magnetic sensor 35 is placed so as to face the two-pole spherical magnet 30. When the spherical magnet 30 rotates and the magnetic field detected by the magnetic sensor 35 changes, outputs having different phases are output from the A-phase output terminals + A and -A and the B-phase output terminals + B and -B of the magnetic sensor 35, respectively. It has become so.

FIG. 7 shows the A phase output from the A phase output terminals + A and −A of the magnetic sensor 35 when the spherical magnet 30 is rotated about the rotation axis J extending in the vertical direction as shown in FIG. The characteristics of the output (peak to peak output voltage) and the B phase output (peak to peak output voltage) output from the B phase output terminals + B and -B are shown. The horizontal axis of the characteristic diagram shown in FIG. 7 represents the angle θ1 formed by the longitudinal center line L of the magnetic sensor 35 shown in FIG. 5 and the direction of the applied magnetic field (applied magnetic field). 7 represents the peak-to-peak output voltage of the A-phase output and the B-phase output.

When the spherical magnet 30 is rotated once (360 °) in the horizontal direction around the rotation axis J extending in the vertical direction, as shown in FIG. 7, each of the magnetic sensors 35 outputs an A-phase output (sin waveform) of one cycle. ) And B phase output (cos waveform).

Therefore, it is possible to specify the angle θ1 between the longitudinal center line L of the magnetic sensor 35 and the direction of the applied magnetic field (applied magnetic field) from the A-phase output and the B-phase output (see FIG. 5). . In other words, the angle θ1 is the rotation angle of the spherical magnet 30 in the horizontal direction.

The anemometer not only rotates about the vertical axis in which the body portion 111 extends in the vertical direction, but also rotates about a horizontal axis (second rotation axis) orthogonal to the first rotation axis. The wind direction is measured three-dimensionally.

Thus, when the body part 111 rotates around the horizontal axis, for example, as shown in FIGS. 8A and 8B, the spherical magnet 30 is inclined and the rotation axis J is orthogonal to the upper surface of the magnetic sensor 35. Disappear.

Here, for example, as shown in FIG. 8A, when the rotation axis J of the spherical magnet 30 is inclined to the left side, the apparent boundary between the S pole and the N pole of the spherical magnet 30 viewed from the magnetic sensor 35 is on the right side. shift. In other words, this is equivalent to the S-pole and N-pole boundary of the spherical magnet 30 shifted to the right.

8B, when the rotation axis J of the spherical magnet 30 is tilted to the right side, the apparent boundary between the S pole and the N pole of the spherical magnet 30 viewed from the magnetic sensor 35 is shifted to the left side. That is, this is equivalent to the S-pole and N-pole boundary of the spherical magnet 30 shifted to the left.

As described above, when the spherical magnet 30 is inclined and the boundary between the S pole and the N pole of the spherical magnet 30 is shifted to the left and right, the A phase output and the B phase output are respectively equal to those of the spherical magnet 30. It attenuates according to the degree of inclination of the rotation axis J.

Specifically, the A-phase output and the B-phase output indicate that the rotation axis J of the spherical magnet 30 is orthogonal to the upper surface (detection surface) of the magnetic sensor 35, that is, the rotation axis of the spherical magnet 30. It becomes maximum when the angle θ2 formed by J and the vertical direction of the upper surface of the magnetic sensor 35 is 0 °. In addition, the A-phase output and the B-phase output are attenuated and become smaller as the angle θ2 increases, and are minimized when the angle θ2 is 90 °. In other words, the angle θ2 is the rotation angle of the spherical magnet 30 in the vertical direction.

In the anemometer, a characteristic map representing the relationship among the A-phase output and B-phase output of the magnetic sensor 35, the horizontal rotation angle θ1 of the spherical magnet 30 and the vertical rotation angle θ2 of the spherical magnet 30 is prepared. ing. Specifically, a map showing the relationship between the A-phase output and B-phase output of the magnetic sensor 35 and the horizontal rotation angle θ1 of the spherical magnet 30 as shown in FIG. A characteristic map is prepared by changing the rotation angle θ2 of each angle by a predetermined angle (for example, 5 °). This characteristic map is stored in the ROM of the control unit 81. The control unit 81 uses the characteristic map stored in the ROM to determine the horizontal rotation angle θ1 of the spherical magnet 30 from the A-phase output and B-phase output output from the magnetic sensor 35 and the vertical direction of the spherical magnet 30. The rotation angle θ2 is specified.

The control unit 81 in the present embodiment specifies the horizontal rotation angle θ1 and the vertical rotation angle θ2 of the spherical magnet 30 from the signals of the A phase output and the B phase output output from the magnetic sensor 35. Signal, that is, a signal for specifying the horizontal component and the vertical component of the wind direction. That is, the control unit 81 specifies the horizontal rotation angle θ1 and the vertical rotation angle θ2 of the spherical magnet 30 from the A-phase output and the B-phase output output from the magnetic sensor 35, and is perpendicular to the horizontal component of the wind direction. Identify ingredients.

Next, the block configuration of the anemometer will be described with reference to FIG. The anemometer includes a magnetic sensor 35, a wind speed sensor 60, a temperature sensor 61, a control unit 81, and a wireless transmission unit 82 corresponding to a transmission unit. The anemometer wirelessly transmits various data such as detected wind direction, wind speed, and temperature to a personal computer (PC) 91, and is installed, for example, in an engine room (measurement space) of an automobile. In addition, the wireless reception unit 90 and the PC 91 are disposed outside the automobile.

The control unit 81 is configured as a computer including a CPU, a ROM, a RAM, an I / O, an A / D conversion unit, and the like, and the CPU performs various processes according to a program stored in the ROM. The control unit 81 includes a sensor control circuit that controls the wind speed sensor 60, an amplification circuit that amplifies a signal input from the temperature sensor 61, and the like.

The wireless transmission unit 82 wirelessly transmits data to a predetermined communication partner. When the frame is input from the control unit 81, the wireless transmission unit 82 wirelessly transmits the frame according to a predetermined communication method.

The control unit 81 performs a wind direction specifying process, a wind speed specifying process, and an air temperature specifying process in parallel. The wind direction specifying process is a process for specifying a horizontal component and a vertical component of the wind direction based on a signal input from the magnetic sensor 35. The wind speed specifying process is a process of specifying the wind speed based on a signal input from the wind speed sensor 60. The temperature specifying process is a process of specifying the temperature based on a signal input from the temperature sensor 61.

In addition, the control unit 81 transmits the wind speed detected by the wind speed sensor 60 that detects the wind speed and the temperature detected by the temperature sensor 61 to the PC 91 that is an external device, together with information indicating the horizontal component and the vertical component of the wind direction. To implement.

When the PC 91 receives a frame transmitted from the anemometer via the wireless receiver 90, the PC 91 extracts necessary data from the frame, and stores the horizontal and vertical components of the wind direction, the wind speed, and the temperature in the storage unit. Implement the process.

The anemometer includes a fixed portion 50, a movable portion 40, a spherical magnet 30, and a magnetic sensor 35. The movable portion 40 is fixed to be rotatable around a vertical axis (first rotation axis) and a horizontal axis (second rotation axis) orthogonal to the first rotation axis so as to face the windward direction. It is attached to the part 50. The spherical magnet 30 is disposed on the movable portion 40 and generates a magnetic field. The magnetic sensor 35 is disposed so as to face the spherical magnet 30, detects a magnetic field generated by the spherical magnet 30, and outputs a signal for specifying a horizontal component and a vertical component of the wind direction. According to this configuration, it is possible to provide an anemometer that can be installed in a narrow space and can measure both the horizontal component and the vertical component of the wind direction.

Further, the anemometer of the present embodiment can measure both the horizontal component and the vertical component of the wind direction with one spherical magnet 30 and one magnetic sensor 35. Therefore, for example, compared with the case where the horizontal component and the vertical component of the wind direction are measured using a plurality of magnets and a plurality of magnetic sensors, both the horizontal component and the vertical component of the wind direction are reduced with a small number of parts. It can be measured. As a result, downsizing and cost reduction of the anemometer can be realized.

Further, since the anemometer further includes a wind speed sensor 60 for detecting the wind speed and a temperature sensor 61 for detecting the air temperature, the wind direction, the wind speed and the air temperature can be measured in a composite manner.

Further, the fixed unit 20 has a fixed stage 21 as a base. The wind speed sensor 60 for detecting the wind speed and the temperature sensor 61 for detecting the temperature are provided on the fixed stage 21 so as not to contact the movable part. Thereby, wind speed and temperature can be detected without narrowing the movable range of the movable part 10.

In this embodiment, the wireless transmission unit 82 transmits information detected by the wind speed sensor 60 and the temperature sensor 61 to the PC 91 that is an external device, together with information indicating the horizontal component and the vertical component of the wind direction. Thereby, it is possible to install an external device in a place away from the anemometer and measure the wind direction, wind speed and temperature.

Further, the fixed stage 21 has a quadrangular outer shape when viewed from the vertical direction, and the wind speed sensor 60 and the temperature sensor 61 are arranged at the peripheral edge of the fixed stage 21. Thereby, the influence by the wind speed sensor 60 and the temperature sensor 61 with respect to the wind direction which the movable part 10 receives can be reduced.

Further, the wind speed sensor 60 and the temperature sensor 61 are arranged on one side of the fixed stage 21. Thereby, the measurement conditions of wind speed and temperature can be made uniform.

(Second Embodiment)
An anemometer according to the second embodiment will be described with reference to FIGS. In the anemometer of the first embodiment, one spherical magnet 30 is disposed on the movable portion 10 and one magnetic sensor 35 is disposed so as to face the spherical magnet 30 to detect the wind direction. The anemometer of the present embodiment has two magnets and two magnetic sensors. Specifically, the anemometer of the present embodiment has a first magnet 31 and a second magnet 32 as two magnets, and a first magnetic sensor 36 and a second magnetic sensor 37 as two magnetic sensors. . In the anemometer of the present embodiment, the first magnet 31 and the first magnetic sensor 36 detect the horizontal component of the wind direction, and the second magnet 32 and the second magnetic sensor 37 detect the vertical component of the wind direction. Each of the first magnet 31 and the second magnet 32 is magnetized in two poles and has a cylindrical shape.

The anemometer according to the present embodiment has a fixed part 50 and a movable part 40. The fixed unit 50 includes a fixed stage 51 and a guide member 52.

The fixed stage 51 corresponds to a bottom plate portion serving as a base, and the upper surface is substantially square as shown in FIG. The fixed stage 51 and the guide member 52 are each formed of resin. The guide member 52 has two side plate portions 52a extending in the vertical direction from both side surfaces of the fixed stage 51, and a top plate portion 52b connecting the two side plate portions 52a. The two side plate portions 52a extend in the vertical direction from two opposite sides of the fixed stage 51, respectively. The length of one side of the upper surface of the fixed stage 51 is about 15 millimeters. The height from the bottom surface of the fixed stage 51 to the top surface of the guide member 52 is about 17 millimeters. The fixed stage 51 is provided with a wind speed sensor 60.

Further, a hole 521 is formed in the top plate portion 52b of the guide member 52. A central portion of the upper surface of the fixed stage 51 is located below the hole portion 521 in the vertical direction, and a hole portion 511 is formed in the central portion.

Also, as shown in FIG. 12, the first magnetic sensor 36 is stored in the fixed stage 51 so as to be located immediately below the hole 511. The first magnetic sensor 36 has the same configuration as the magnetic sensor 35 of the first embodiment.

Further, a circuit board (not shown) is stored in the fixed stage 51. Further, a connection line 80b for supplying power is connected to the circuit board. Power is supplied from the vehicle via the connection line 80b.

The movable part 40 has a frame-shaped frame member 41 corresponding to the first member and a movable member 42 corresponding to the second member. A protrusion 411 that protrudes from the frame member 41 to the outer peripheral side is formed at the center of the upper surface in the vertical direction of the frame member 41 in the left-right direction. Similarly, a protruding portion 411 that protrudes from the frame member 41 to the outer peripheral side is formed at the central portion of the lower surface in the vertical direction of the frame member 41. The left-right direction referred to here is the left-right direction in FIG.

The protrusion 411 formed on the upper surface of the frame member 41 is inserted into the hole 521 formed in the top plate 52 b of the guide member 52. Further, the protrusion 411 formed on the lower surface of the frame member 41 is inserted into a hole 511 formed in the center of the upper surface of the fixed stage 51.

Thus, the frame member 41 is supported by the guide member 52 of the fixed portion 50 and rotates through the hole portion 521 of the guide member 52 and the hole portion 511 of the fixed stage 51, that is, a vertical axis (first axis extending in the vertical direction). 1 rotation axis).

Further, the fixed stage 51 is provided with the first magnet 31 so as to be positioned below the protrusion 411 formed on the lower surface of the frame member 41 in the vertical direction. That is, the first magnet 31 is disposed so as to face the first magnetic sensor 36 stored in the fixed stage 51 (see FIG. 12).

As shown in FIG. 13, fixing portions 412 are provided on two side surfaces of the frame member 41 in the left-right direction. In other words, the fixing portions 412 are respectively provided on two side surfaces of the frame member 41 that are opposed in the horizontal direction. Hole portions 413 (concave portions) are formed in the inner peripheral surface of each fixing portion 412. In addition, when the anemometer is viewed from the front side, a second magnetic sensor 37 is stored in the right fixed portion 412. In other words, the second magnetic sensor 37 is stored in one of the two fixed portions 412. The second magnetic sensor 37 has the same configuration as the magnetic sensor 35 of the first embodiment. The front side means the opposite side of the connection line 80b to the vertical axis in the direction in which the side of the fixed stage 51 to which the connection line 80b is connected and the side opposite to the side are aligned.

As shown in FIG. 13, the movable member 42 has a body portion 421, a blade portion 422, an arm portion 423, and a rotation support member 424. The body part 421, the blade part 422, the arm part 423, and the rotation support member 424 are integrally formed of resin. Moreover, the trunk | drum 421 has the rounded front-end | tip part 421a.

The blade portion 422 includes a thin plate-like horizontal blade (second plate member) 422a extending in the horizontal direction and a thin plate-like vertical blade (first plate member) 422b extending in the vertical direction from the horizontal blade 422a. . At both ends in the horizontal direction of the horizontal wing 422a, arm portions 423 extending toward the front end portion 421a side of the body portion 421 are provided so as to be parallel to the body portion 421, respectively.

In addition, a rotation support member 424 is provided at the tip of each arm portion 423. Each rotation support member 424 has a protrusion 424a, and the protrusion 424a is inserted into a hole 413 formed on the inner peripheral side of two side surfaces of the frame member 41 facing in the horizontal direction. The The movable member 42 is supported by the frame member 41 by inserting the protrusions 424 a into the holes 413.

The movable member 42 is supported by the frame member 41 so as to be rotatable around a rotation axis passing through each hole 413 of the frame member 41, that is, a horizontal axis (second rotation axis).

Further, the second magnet 32 is stored in one rotation support member 424. The second magnet 32 is disposed so as to face the second magnetic sensor 37 stored in one fixed portion 412 in the horizontal direction.

Since the balance of the body part 421 affects the measurement of the vertical component of the wind direction, the movable member 42 is configured so that the body part 421 is horizontal when there is no wind.

Next, the operation of the anemometer of this embodiment will be described. The anemometer is installed such that the upper surface of the fixed stage 51 is horizontal to the installation surface. The body portion 421 is horizontal when there is no wind. The anemometer is supplied with power from the vehicle via a connection line 80b.

When the anemometer receives wind from the horizontal direction, the movable member 42 and the frame member 41 rotate around the vertical axis so that the front end 421a of the body 421 faces upwind while maintaining the body 421 horizontal. . At this time, the first magnet 31 together with the frame member 41 also rotates around the vertical axis.

Or, for example, when the anemometer receives wind from an obliquely upward direction, the movable member 42 rotates around the horizontal axis so that the tip 421a moves upward in the vertical direction and faces upwind. At this time, the second magnet 32 rotates around the horizontal axis together with the movable member 42.

Or, for example, when the anemometer receives wind from an obliquely downward direction, the movable member 42 rotates around the horizontal axis so that the tip 421a moves downward in the vertical direction and faces upwind. At this time, the second magnet 32 rotates around the horizontal axis together with the movable member 42.

The anemometer of the present embodiment detects a horizontal component of the wind direction with the pair of first magnets 31 and the first magnetic sensor 36, and detects the vertical component of the wind direction with the pair of second magnets 32 and the second magnetic sensor 37. It is configured as follows.

As shown in FIG. 14, the

magnetic sensors

36 and 37 of the anemometer of the present embodiment are configured so that the rotation axis J of the

magnetic sensors

36 and 37 is orthogonal to the upper surfaces (detection surfaces) of the

magnetic sensors

36 and 37, respectively. Be placed. In the anemometer of this embodiment, when the

magnets

31 and 32 are rotated about the rotation axis J, the A phase output terminals + A and −A of the

magnetic sensors

36 and 37 to the A phase are the same as those shown in FIG. The output is output, and the B-phase output is output from the B-phase output terminals + B and -B.

The first magnetic sensor 36 detects the magnetic field of the first magnet 31 provided on the frame member 41 supported so as to be rotatable about the vertical axis, and outputs a signal for specifying the horizontal component of the wind direction. .

The second magnetic sensor 37 detects a magnetic field of the second magnet 32 provided on the movable member 42 supported so as to be rotatable around a horizontal axis, and outputs a signal for specifying the vertical component of the wind direction. .

The control unit 81 specifies the horizontal component and the vertical component of the wind direction from the A-phase output and the B-phase output output from the first magnetic sensor 36, and the A-phase output and the B-phase output output from the second magnetic sensor 37. To determine the horizontal and vertical components of the wind direction.

Further, the control unit 81 performs a wind speed specifying process for specifying the wind speed based on a signal input from the wind speed sensor 60. In addition, the control unit 81 performs a process of transmitting the wind speed detected by the wind speed sensor 60 to the PC 91 that is an external device together with information indicating the horizontal component and the vertical component of the wind direction.

In this embodiment, it is possible to obtain the same effect as that of the first embodiment, which is obtained from the configuration common to the first embodiment.

The movable part 40 includes a frame member 41 supported by the fixed part 50 so as to be rotatable around a vertical axis, and a movable member 42 supported by the frame member 41 so as to be rotatable around a horizontal axis. Yes. Further, the magnet has a first magnet 31 disposed on the frame member 41 and a second magnet 32 disposed on the movable member 42. The magnetic sensor is fixed to the fixing unit 50 so as to face the first magnet 31, and includes a first magnetic sensor 36 and a second magnetic sensor 37. The first magnetic sensor 36 detects a magnetic field generated by the first magnet 31 and outputs a signal for specifying the horizontal component of the wind direction. The second magnetic sensor 37 is fixed to the frame member 41 so as to face the second magnet 32, detects a magnetic field generated by the second magnet 32, and outputs a signal for specifying the vertical component of the wind direction.

Thus, since the horizontal component and the vertical component of the wind direction are separately detected by the first magnetic sensor 36 and the second magnetic sensor 37, the horizontal component and the vertical component of the wind direction can be accurately detected. It is also possible to simplify the processing and circuit configuration of the control unit 81.

The wind direction anemometer described in Patent Document 1 (Japanese Patent Application Laid-Open No. 2001-215241) includes a wind direction vertical component detector and a wind direction vertical component detector that are composed of a coil and a magnet having an iron core and a winding. is doing. Therefore, the anemometer of Patent Document 1 is difficult to downsize, and for example, it is difficult to install it in a narrow space in the engine room with the hood closed.

In addition, this anemometer is a method for detecting an electromotive force generated in a coil by electromagnetic induction. For this reason, for example, in a windless state, since the magnet is stationary and no electromotive force is generated in the coil, the direction in which the body portion is facing cannot be detected.

In contrast, the anemometer according to the present embodiment outputs an A-phase output and a B-phase output from the magnetic sensor 35 while applying a constant voltage to the magnetic sensor 35. As a result, it is possible to detect the direction in which the body portion 111 is facing even in a windless state.

(Other embodiments)
In each of the above embodiments, an example in which the wind direction in the engine room (measurement space) of the automobile is detected has been described. However, a wind direction other than such a space can also be detected.

In each of the above embodiments, an example in which the wind direction is detected by one anemometer is shown. However, for example, it is possible to install a plurality of anemometers in a narrow space such as in an engine room to analyze a complicated air flow.

Further, in each of the above embodiments, the power is supplied from the vehicle via the connection line connected to the connector terminal 80a or the connection line 80b. However, the power supply may be made wireless by storing a battery for supplying the power.

In each of the above embodiments, the controller 81 performs the wind direction specifying process, the wind speed specifying process, and the air temperature specifying process using the signals output from the magnetic sensor 35, the wind speed sensor 60, and the temperature sensor 61. However, the control unit 81 may not perform the processing for specifying the wind direction, wind speed, and temperature. For example, after the data is wirelessly transmitted to the PC 91 via the wireless transmission unit 82, the wind direction specifying process, the wind speed specifying process, and the air temperature specifying process may be performed on the software in the PC 91.

In each of the above embodiments, data is wirelessly transmitted from the anemometer to the PC 91 via the wireless transmission unit 82. However, the anemometer and the PC 91 may be connected by wire, and data may be transmitted from the anemometer to the PC 91 by wire communication.

In the first embodiment, the configuration including the wind speed sensor 60 and the temperature sensor 61 is shown, but the wind speed sensor 60 and the temperature sensor 61 are not necessarily provided. In addition, as shown in FIG. 15, a triaxial geomagnetic sensor 62 that detects geomagnetism and outputs a signal indicating geomagnetism, and a triaxial tilt angle sensor that detects a tilt angle and outputs a signal indicating the tilt angle. 63 and a humidity sensor 64 that detects the humidity and outputs a signal indicating the humidity may be provided in the fixed stage 21. The geomagnetic sensor 62 may be configured using an acceleration sensor. Further, it may be configured to include at least one of these sensors 60-64.

In the second embodiment, the configuration including the wind speed sensor 60 is shown, but the wind speed sensor 60 is not necessarily provided. Further, the fixed stage 51 may include at least one of the sensors 60 to 64 shown in FIG.

In particular, in each of the above embodiments, by including the geomagnetic sensor 62, it is possible to detect which direction (direction) the anemometer is installed. It is also possible to specify the direction (direction) of the wind direction based on the detection result of the geomagnetic sensor 62.

In each of the above embodiments, by providing the tilt angle sensor 63, it is possible to detect whether or not the anemometer is installed tilted. For example, when an anemometer is installed in a narrow space, it is conceivable that the anemometers cannot be installed horizontally. Even in this case, it is also possible to correct the wind direction based on the detection result of the inclination angle sensor 63 by providing the inclination angle sensor 63.

Further, in each of the above-described embodiments, at least one sensor among the wind speed sensor 60 that detects the wind speed, the temperature sensor 61 that detects the air temperature, and the humidity sensor 64 that detects the humidity does not come into contact with the

movable parts

10 and 40. , 51 may be provided. The movable range of the

movable parts

10 and 40 can be prevented from being narrowed.

In each of the above embodiments, at least one of the wind speed sensor 60, the temperature sensor 61, and the humidity sensor 64 may be disposed on the periphery of the

bottom plate portions

21 and 51. Thereby, it is possible to reduce the influence on the wind direction by each sensor.

Further, the

bottom plate portions

21 and 51 have a quadrangular outer shape on the top surface, and at least one of the wind speed sensor 60, the temperature sensor 61, and the humidity sensor 64 is arranged on one side of the

bottom plate portions

21 and 51. Good. Alternatively, at least two of the wind speed sensor 60, the temperature sensor 61, and the humidity sensor 64 may be arranged on one side of the

bottom plate portions

21 and 51. Thereby, it is possible to arrange the measurement conditions of each sensor.

It should be noted that the present disclosure is not limited to the above-described embodiment, and can be appropriately changed without departing from the scope of the present disclosure. Further, the above embodiments are not irrelevant to each other, and can be combined as appropriate unless the combination is clearly impossible. In each of the above-described embodiments, it is needless to say that elements constituting the embodiment are not necessarily essential unless explicitly stated as essential and clearly considered essential in principle. Yes. In each of the above embodiments, when referring to the material, shape, positional relationship, etc. of the constituent elements, etc., unless otherwise specified, or in principle limited to a specific material, shape, positional relationship, etc. The material, shape, positional relationship, etc. are not limited.

Claims

A fixing part (20, 50);
Movable parts (10, 40) attached to the fixed part so as to be rotatable around the first rotation axis and around the second rotation axis perpendicular to the first rotation axis so as to face the windward direction When,
Magnets (30, 31, 32) that are arranged in the movable part and generate a magnetic field;
An anemometer comprising a magnetic sensor (35 to 37) arranged to face the magnet and outputting a signal for detecting a magnetic field generated by the magnet and specifying a horizontal component and a vertical component of the wind direction.
The magnet has one spherical magnet (30),
The magnetic sensor is
Arranged in the fixed part so as to face the spherical magnet,
The anemometer according to claim 1, further comprising one magnetic sensor (35) for detecting a magnetic field generated by the spherical magnet and outputting a signal for specifying a horizontal component and a vertical component of the wind direction.
The movable part is
A first member (41) supported by the fixed portion so as to be rotatable around the first rotation axis;
A second member (42) supported by the first member so as to be rotatable about the second rotation axis,
The magnet
A first magnet (31) disposed on the first member;
A second magnet (32) disposed on the second member,
The magnetic sensor is
A first magnetic sensor (36) that is fixed to the fixed portion so as to face the first magnet and detects a magnetic field generated by the first magnet and outputs a signal for specifying a horizontal component of the wind direction;
A second magnetic sensor (37) fixed to the first member so as to face the second magnet, and detecting a magnetic field generated by the second magnet and outputting a signal for specifying a vertical component of the wind direction; The anemometer according to claim 1, comprising:
The anemometer according to any one of claims 1 to 3, further comprising a geomagnetic sensor (62) for detecting geomagnetism and outputting a signal indicating geomagnetism.
The anemometer according to any one of claims 1 to 4, further comprising an inclination angle sensor (63) that detects an inclination angle of the fixed portion and outputs a signal indicating the inclination angle.
The fixed portion has a base plate portion (21, 51) that serves as a base,
At least one of a wind speed sensor (60) for detecting wind speed, a temperature sensor (61) for detecting air temperature, and a humidity sensor (64) for detecting humidity is provided on the bottom plate portion so as not to contact the movable portion. The anemometer according to any one of claims 1 to 5.
At least one of a wind speed sensor (60) for detecting the wind speed, a temperature sensor (61) for detecting air temperature, and a humidity sensor (64) for detecting humidity, together with information indicating the horizontal and vertical components of the wind direction. The anemometer according to claim 6, further comprising a transmitter (82) for transmitting the detected information to an external device (91).
The anemometer according to claim 6 or 7, wherein the at least one sensor is arranged at a peripheral edge of the bottom plate.
The fixed portion has a base plate portion (21, 51) that serves as a base,
The bottom plate portion is
The outer shape of the upper surface is a square,
A wind speed sensor for detecting the wind speed, a temperature sensor for detecting the temperature, and a humidity sensor for detecting the humidity.
The anemometer according to any one of claims 1 to 5, wherein the at least two sensors are arranged on one side of the bottom plate portion.
The movable part (10, 40) is
A thin plate-like first plate member (112b, 422b) extending in the axial direction of the first rotation shaft;
The anemometer according to any one of claims 1 to 9, further comprising a thin plate-like second plate member (112a, 422a) extending in an axial direction of the second rotation shaft.
The fixing part (20)
A base plate (21) as a base;
A support member (22) extending from the bottom plate portion toward the movable portion and supporting the movable portion;
The anemometer according to any one of claims 1 to 10, wherein the magnet (30) and the magnetic sensor (35) are arranged so as to be aligned in a direction in which the support member extends.
The anemometer according to claim 11, wherein a distance between the magnet and the magnetic sensor is shorter than a distance between the magnetic sensor and the bottom plate.
The anemometer according to claim 11, wherein the magnetic sensor is provided between the magnet and the bottom plate portion.