WO2012014321A1

WO2012014321A1 - Wind detection device

Info

Publication number: WO2012014321A1
Application number: PCT/JP2010/062922
Authority: WO
Inventors: 泰輝児玉; 隆二郎藤田; 岳彦塩田
Original assignee: パイオニア株式会社
Priority date: 2010-07-30
Filing date: 2010-07-30
Publication date: 2012-02-02
Also published as: JP5489137B2; JPWO2012014321A1

Abstract

Disclosed is a low-cost wind detection device with increased directivity in the direction of travel. The disclosed wind detection device is provided with: a wind guide body (10, 110, 210) having an inlet (11A, 111A, 211A) where air enters, an outlet (11B, 111B, 211B, 211C) where air exits, and a flow passage (11, 111, 211) which connects the inlet (11A, 111A, 211A) and the outlet (11B, 111B, 211B, 211C) and through which air flows; and a sound measurement device (12, 112, 212) which measures sound and is positioned so as to be spatially connected with the flow passage (11, 111, 211). The flow passage (11, 111, 211) is closed circumferentially along the length direction, and the outlet (11B, 111B, 211B, 211C) is wider than the inlet (11A, 111A, 211A).

Description

Wind detector

The present invention relates to a wind detecting device having directivity.

Due to the recent increase in health consciousness, outdoor sports such as walking, running, and cycling are widely used as hobbies. Some persons who perform such outdoor sports use a device that measures a movement speed, a movement distance, or calorie consumption. That is, there is a person who confirms the movement distance and calorie consumption in real time as the progress, a person who confirms the movement speed in real time as the exercise content, and a person who confirms or records the movement distance and calorie consumption as a result. As described above, a person who performs outdoor sports enjoys outdoor sports by using a predetermined device to set and measure his / her own indicators.

By the way, outdoor sports such as walking are performed in the natural environment, so the influence of the wind is great. For example, when driving a bicycle, the air resistance increases when the head wind increases (the wind speed of the head wind increases). The speed is reduced. Therefore, when the driver's exercise state (for example, the number of rotations of the pedal) is used as an indicator of traveling, the traveling speed decreases when the headwind blows. In this case, even if the cause of the decrease in speed is in the wind, the driver misunderstands that the traveling speed has decreased because the degree of fatigue has increased, and the driver cannot travel comfortably. In the case of a bicycle, when it exceeds 30 km / h, most of the resistance to running becomes air resistance.

Also, when the travel speed is used as an index of travel, if the air resistance also changes with the change of wind, the driver adjusts the number of rotations of the pedal so as to keep the travel speed constant. Therefore, even if the vehicle travels on the same course, a difference occurs in the work performed by the driver according to the strength of the wind. In the case of strong headwinds, in order to keep the running speed constant, work that exceeds the capacity for air resistance may be required. In this case, the driver cannot feel uncomfortable or humiliated because the running speed cannot be kept constant, as well as physical fatigue.

Thus, the air resistance caused by the wind affects the driver both mentally and physically, so it can be said that it is an important indicator for driving. The distance traveled by the mobile person relative to the air (atmosphere) (hereinafter referred to as “the travel distance relative to the air”), which is related to the air resistance, is considered to be a new indicator for outdoor sports. This “movement distance with respect to the air” can be calculated by integrating the “relative speed of the mobile person (sport performer) with respect to the air (atmosphere)”.

In order to calculate the moving distance with respect to the air, it is necessary to measure the relative speed of the moving person with respect to the air. Here, it is difficult to directly measure the relative speed of the moving person with respect to the air. However, if a device for detecting wind (see, for example, Patent Documents 1 to 3) is used, the relative speed of the air with respect to the moving person can be easily determined. Can be measured. The relative speed of the moving person with respect to the air and the relative speed of the atmospheric air with respect to the moving person are opposite in direction, but are the same in size (speed). Therefore, the movement distance with respect to the air can be calculated by measuring the relative velocity of the air with respect to the moving person using the device that detects the wind.

The wind detection device described in Patent Document 1 (hereinafter referred to as “prior art 1”) includes a wind direction sensor and a cylindrical wind guide tube, and a sensing unit constituting the wind direction sensor is disposed in the wind guide tube. Has been. Here, the wind direction sensor can measure wind speed and wind force. Prior art 1 measures the axial component of the introduction pipe of the wind speed by letting the wind flow through the wind guide pipe.

A wind detection device described in Patent Document 2 (hereinafter referred to as “prior art 2”) includes a first vortex body and a second vortex body that generate Karman vortices, and microphones attached to the vortex bodies. And a pressure conduit for transmitting the pressure fluctuation of the Karman vortex attached to each vortex body to the microphone. Prior art 2 measures the wind speed by causing a wind to collide with the vortex and generating a Karman vortex.

The wind detection device described in Patent Document 3 (hereinafter referred to as “prior art 3”) is converted by an air flow / acoustic conversion unit that converts an air flow blown from an opening into an acoustic wave, and an air flow / acoustic conversion unit. A microphone that collects sound and converts it into an electrical signal. Prior art 3 measures the wind speed by bringing the airflow (wind) into contact with the airflow / acoustic converter.

JP 2000-162229 A JP-A-6-194374 JP 2004-317191 A

Prior art 1 is generally bi-directional and can measure the wind speed in a specific direction such as a traveling direction, but is expensive because it includes a wind speed sensor. In that respect, the prior art 2 and the prior art 3 are provided with a microphone, and therefore are less expensive than the prior art 1. However, the prior art 2 has no description of directivity and does not consider directivity. Further, although the prior art 3 can detect the wind direction, it has a complicated structure and requires two microphones, so it is difficult to suppress a reduction in manufacturing cost.

An object of the present invention is to provide an inexpensive wind detection device that can improve the directivity in the traveling direction in view of the above background.

In order to solve the above problems, a wind detection device according to the present invention includes an inflow port through which air flows in, an outflow port through which air flows out, and a flow through which air is circulated in communication with the inflow port and the outflow port. A wind guide body having a path, and a sound measuring device that is spatially connected to the flow path and measures sound, and the flow path is closed in a circumferential direction with respect to its length direction, The outlet is wider than the inlet.

(A) is a side view of a bicycle to which a moving body measuring device having a wind detection device is attached, and (b) is an enlarged view of a portion to which the moving body measuring device is attached in the bicycle of FIG. . (A) is a front view of the mobile body measuring device in Embodiment 1, (b) is a rear view of the mobile body measuring device in Embodiment 1, and (c) is a longitudinal section of the mobile body measuring device in Embodiment 1. FIG. 2D is a cross-sectional view taken along the line AA in FIG. (A) is a front view of the mobile body measuring device in Embodiment 2, (b) is a longitudinal sectional view of the mobile body measuring device in Embodiment 2, and (c) is the bottom surface of the mobile body measuring device in Embodiment 2. FIG. (A) is a front view of the mobile body measuring device in Embodiment 3, (b) is a longitudinal sectional view of the mobile body measuring device in Embodiment 3, and (c) is a bottom surface of the mobile body measuring device in Embodiment 3. FIG. It is a graph showing the directivity of a wind detection apparatus.

(Embodiment 1)
Hereinafter, embodiments of the present invention will be specifically described with reference to the drawings. FIG. 1 is an external view showing a state in which the wind speed measuring structure of the present invention is used in a moving body measuring apparatus and the moving body measuring apparatus is attached to a bicycle B. A moving body measuring device takes in an air flow such as wind, generates sound from the captured air flow, and measures the volume of the sound (the amplitude of vibration that causes the sound) (sound measurement) (Structure) 1, a display device 2 for displaying preset items, and a main body portion 100a in which the input means 3 is integrated in the main body 10 and an attachment portion 100b for fixing the main body portion 100a to the bicycle. It comprises. The moving body measuring apparatus 100 measures the wind speed from the loudness of the sound measured by the wind detecting apparatus 1 and uses the wind speed to set various preset calorie consumption, movement distance in the atmosphere, work amount, and the like. The value is calculated and displayed on the display device 2.

As shown in FIG. 1, the attachment portion 100b has a mechanism that is fixed to the handle B1 while gripping the handle B1 of the bicycle B. The attachment portion 100b is connected to the main body portion 100a. When the moving body measuring apparatus 100 is normally attached to the bicycle B, the attachment portion 100b is located above the handle B1, and the main body portion 100a is located above the attachment portion 100b. Is located.

As shown in FIGS. 2 (a) to 2 (c), the main body 10 has a substantially flat plate shape, a mounting portion 100b is provided on one bottom surface, and predetermined information is displayed on the other bottom surface. A display unit 21 of the display device 2 and an operation unit 31 of the input means 3 capable of input operation are provided. Therefore, when the moving body measuring apparatus 100 is attached to the bicycle B, one bottom surface faces the handle B1 of the bicycle B, and the other bottom surface faces the atmosphere (driver). Therefore, the driver can easily visually recognize the display unit 21 of the display device 2 and the operation unit 31 of the input device 3.

In the present embodiment, both bottom surfaces of the main body 10 have a substantially elliptical shape or a substantially elliptical shape with different diagonal lengths, and the mobile body measuring device 100 is normally attached to the bicycle B. The major axis direction of the bottom surface coincides with the moving direction of the bicycle. Further, the display unit 21 and the operation unit 31 are arranged side by side in the long axis direction of the bottom surface of the main body unit 100a. When the moving body measuring device 100 is normally attached to the bicycle B, the display unit 21 is On the front side of the bicycle B, the operation unit 31 is located on the rear side of the bicycle B.

The main body 10 is provided with a wind detection device 1. The wind detection device 1 generates a sound (vibration) from the air flow on the upstream side of the flow passage 11 through which an air flow such as wind flows and the sound (vibration) is measured. A detection port (sound generating means) 13 is provided.

The flow passage 11 includes a hole that vertically cuts the main body 10 in the major axis direction of the bottom surface of the main body 10. The holes constituting the flow passage 11 are formed from one end surface of the main body 10 to the other end surface. And the part of the hole currently formed in the end surface of the advancing direction side (front side) of the bicycle B comprises the inflow port 11A of the flow path 11, and is formed in the other driver side (rear side) end surface. The hole portion constitutes the outlet 11 B of the flow passage 11. The flow passage 11 is surrounded by the main body 10 in the entire circumferential direction with respect to the central axis C1 (length direction). Accordingly, an air flow such as wind coming from the front during traveling of the bicycle B flows into the flow passage 11 from the inflow port 11A, and flows out of the outflow port 11B through the flow passage 11.

The cross section of the flow passage 11 has a substantially rectangular shape and gradually expands from the front side toward the rear side. That is, the outlet 11B is wider than the inlet 11A. However, in this embodiment, the length of the flow passage 11 in the direction perpendicular to the bottom surface of the main body 10 is constant, and only the length in the major axis direction of the bottom surface of the main body 10 of the flow passage 11 is from the traveling direction side. It is expanding towards the driver side. Further, the central axis C 1 of the flow passage 11 is a straight line parallel to the bottom surface of the main body 10.

In Embodiment 1, the cross-section of the flow passage 11 has a substantially rectangular shape, but the cross-sectional shape of the flow passage 11 is not particularly limited. Further, only the length in the major axis direction of the bottom surface of the main body 10 of the flow passage 11 is enlarged from the front side toward the rear side, but it is sufficient that the cross section of the flow passage 11 is enlarged in that direction. The mode of expansion is not particularly limited. Further, although the central axis C1 of the flow passage 11 is a straight line parallel to the bottom surface of the main body 10, it may be a straight line inclined to the bottom surface of the main body 10 or a curved line.

A sound measuring device 12 is provided at the center of the flow passage 11. That is, the sound measuring device 12 is disposed between the bottom surface of the main body 10 where the display unit 21 and the operation unit 31 are provided and the flow passage 11. As long as the sound measuring device 12 can measure sound (vibration), its structure and shape are not particularly limited. In the present embodiment, a MEMS microphone packaged in a flat plate shape is used as the sound detector 12.

In addition, a detection port 13 is formed from the hole wall of the flow passage 11 to a mouth portion (not shown, hereinafter referred to as “sound port”) for collecting the sound of the sound measuring device 12, It communicates with the mouth. The airflow flowing toward the bicycle B flows into the flow passage 11 from the inflow port 11 A and flows through the flow passage 11. When passing through the detection port 13, a turbulent flow (so-called “wind noise”) is generated and moves in the detection port 13 toward the sound measuring device 12. As a result, the sound measuring device 12 measures turbulent flow generated by an air flow such as wind as sound (so-called “wind noise”). The shape of the detection port 14 is not particularly limited, but if the detection port 13 has a columnar shape, sound (vibration) attenuation due to bending loss can be suppressed, and therefore the detection port 13 has a columnar shape. Is desirable.

Here, the following is empirically known as the behavior of the air flow when a hollow structure having an inlet / outlet opened at both ends is arranged in the atmosphere. When the hollow portion of the hollow structure expands along the air flow (hereinafter referred to as “case 1”), the flow velocity of the air flow increases toward the outlet of the hollow structure. On the other hand, when the hollow portion of the hollow structure is contracted along the air flow (hereinafter referred to as “case 2”), the flow velocity of the air flow decreases toward the outlet of the hollow structure. Here, since it is in the atmosphere even near the entrance / exit of the hollow structure, in any case, the pressure just before the air flow enters the hollow structure inlet is The air pressure immediately after exiting from the outlet is also the same. That is, the velocity distribution of the air flow in the cavity varies depending on whether the air flow is enlarged or reduced along the air flow.

From this tendency, for example, when the flow path 11 expands from the front side to the rear side of the bicycle B as in the present embodiment, the directivity with respect to the air flow from the rear of the bicycle B toward the bicycle B The directivity with respect to the airflow from the front of the bicycle B toward the bicycle B becomes higher. The reason for this will be described below. In any case, the pressure immediately before the inlet and the pressure immediately after the outlet are the same as the atmospheric pressure, so the speed of the air flow immediately before the outlet is different. In this case, in the case 2, it is decelerated and becomes slower than the wind speed in the atmosphere. Therefore, the loudness of the sound measured by the sound measuring device 12 provided in the middle of the flow passage 11 with respect to the same wind speed is larger in the case 1. That is, the directivity of the sound generated by the airflow such as the wind from the front of the bicycle B toward the bicycle B is higher when the flow passage 11 expands along the airflow. Further, since the loudness of the sound measured by the sound measuring device 12 is faster than the wind speed in the atmosphere in the case 1 and slower than the wind speed in the atmosphere in the case 2, the wind detection with respect to the moving direction of the bicycle B is detected. The directivity of the device 1 is biased to the front side of the bicycle B as a whole (see FIG. 5).

Here, the graph shown in FIG. 5 shows the directivity of the wind detection device 1 in the first embodiment, the directivity of the wind detection device 101 in the second embodiment to be described later, and the directivity of the wind detection device 201 in the second embodiment. FIG. 5 is a graph showing the directivity of a device in which the wind direction sensor of Prior Art 1 described above is replaced with a sound measuring device 12 (hereinafter referred to as Replacement Prior Art 1). In FIG. 5, the distance from the origin represents the level of directivity in the direction of the wind detection device 1, that is, the sensitivity to the direction. Note that the direction of directivity corresponds to an angle centered on the origin, where 0 degree is in front of the wind detection apparatus 1, 180 degrees is behind the wind detection apparatus 1, and 90 degrees and 270 degrees are wind detection. The side of the device 1 is shown.

As shown in FIG. 5, the directivity of the replacement prior art 1 is stronger at 90 degrees and 270 degrees than at 0 degrees and 180 degrees. The reason for this will be described below. Basically, turbulence is generated by the wind moving from the front and the rear of the wind detection device 1 to the wind detection device 1, but the wind moves from the side of the wind detection device 1 to the wind detection device 1. When this occurs, since a larger turbulent flow (wind noise) is generated near the entrance / exit of the flow path 11, the sound measuring device 12 of the replacement prior art 1 detects sound. For this reason, the directivity of the replacement prior art is stronger to the side (90 degrees and 270) than to the front and rear (0 degrees and 180 degrees) of the wind detection device 1.

Further, the directivity of the wind detection device 1 is stronger at 0 degree than 180 degrees because the outlet 11B is wider than the inlet 11A as described above. Note that the graph of FIG. 5 shows that the wind detection device measured the volume of sound when the wind detection device was given a wind of a predetermined wind speed while rotating 30 degrees at 0 degrees in front of the wind detection device. It is a result (experimental result).

(Embodiment 2)
Next, a second embodiment of the present invention will be described. The description of the same reference numerals and names as those in Embodiment 1 is omitted. The moving body measuring device 200 includes a wind detecting device 101 that measures sound, a display device 102 that displays preset items, and an input device 103 incorporated in a main body 110 and integrated into a main body portion 200a. And an attachment portion 100b for fixing the main body portion 200a to the bicycle.

The wind detection device 101 is provided in a range in front of the bicycle B from the display unit 121 of the main body 110. The wind detection device 101 generates a sound (vibration) from the air flow on the upstream side of the flow path 111 through which an air flow such as wind flows and the sound (vibration) is measured. A detection port (sound generating means) 113 is provided.

The flow path 111 is configured by a hole that is bent from the front end surface of the main body 110 to the bottom surface to which the mounting portion 100b of the main body 110 is connected. The portion of the hole formed in the end surface of the main body 110 constitutes the inlet 111A of the flow passage 111, and the portion of the hole formed in the bottom surface of the main body 110 constitutes the outlet 111B of the flow passage 111. The flow passage 111 is surrounded by the main body 110 in the entire circumferential direction with respect to the central axis C2. Accordingly, an air flow such as wind coming from the front during the traveling of the bicycle B flows in from the inflow port 111A, flows out of the outflow port 111B through the flow path 111.

In the present embodiment, the inflow port 111A has a substantially rectangular shape, and the outflow port 111B has a substantially elliptical shape. In addition, the outlet 111B is wider than the inlet 111A, and the cross section of the inlet passage 111 expands from the front side toward the rear side. In the present embodiment, the flow path 111 is bent halfway, and the cross section of the flow path 111 from the inlet 111A to the break point is the same as the inlet 111A, and the flow from the break point to the outlet 111B. The cross section of the channel 111 is enlarged toward the outlet 111B. In addition, the flow passage 111 is directed upward from the break point, and an outlet 111 B is formed on the surface of the main body 110. Thus, since the outflow port 111B is formed in the surface, the detection of the sound outside the detection purpose which generate | occur | produces on the ground is prevented, and the fall of the precision of the wind noise detection apparatus 101 can be suppressed.

A sound measuring instrument 112 and a detection port 113 are provided in a portion from the inlet 111 A to the break point of the flow passage 111. That is, the sound measuring instrument 112 and the detection port 113 are disposed between the bottom surface of the main body 10 where the display unit 121 and the operation unit 131 are provided and the portion of the flow passage 111 from the inlet 111A to the break point. Yes.

As long as the sound measuring instrument 112 can measure sound (vibration), its structure and shape are not particularly limited. In the present embodiment, a MEMS microphone packaged in a flat plate shape is used as the sound detector 112.

Further, the detection port 113 is formed from a hole wall near the sound detector 112 in the flow passage 111 to a mouth portion (not shown, hereinafter referred to as “sound port”) for collecting the sound of the sound measuring device 112. That is, the flow path 111 and the sound port of the sound detector 112 are communicated with each other by the detection port 113. Therefore, the airflow flowing toward the bicycle B flows into the flow passage 111 from the inflow port 111A and flows through the flow passage 111 toward the outflow port 111B. At this time, when the air flow passes through the detection port 113, turbulent flow (so-called “wind noise”) is generated and moves in the detection port 113 toward the sound measuring instrument 112. As a result, the sound measuring device 112 measures turbulent flow generated by an air flow such as wind as sound.

Also in the present embodiment, as in the first embodiment, the cross section of the flow passage 111 is enlarged along the air flow, but the direction of the outlet 111B and the direction of the inlet 111A of the flow passage 111 Are different in that they are orthogonal. That is, the direction of the airflow such as wind from the rear of the bicycle B toward the bicycle B is parallel to the surface direction of the rear opening of the flow passage 11 of the first embodiment and the surface direction of the outlet 111B of the present embodiment. It is. In the point that the direction of the air flow and the surface direction of the outlet 111B are parallel to each other, the air flow such as wind directed from the side of the bicycle B toward the bicycle B in the case of the first embodiment and the surface direction of the outlet 11B. Same as relationship.

However, in the case of the first embodiment and the case of the present embodiment, the shape of the flow passage after the air flow such as the wind from the side of the bicycle B toward the bicycle B flows from the outlet, that is, the flow passage is Whether it is straight or bent. In the case of the present embodiment, the direction of the air flow that moves in the direction opposite to the traveling direction of the bicycle B, the direction of the air flow that moves from the side of the bicycle B toward the bicycle B, and the surface of the outlet 111B. Parallel to the direction. In the former case, the direction of the incoming air flow matches the direction of the central axis C2 of the flow passage 111. In the latter case, the direction of the incoming air flow and the direction of the central axis C2 of the flow passage 111 Are orthogonal. That is, the air flow is less likely to propagate through the flow path 111 when flowing from the side of the bicycle B toward the bicycle B. As a result, the directivity of the wind detection device 101 with respect to the direction of the airflow from the measurement of the bicycle B toward the bicycle B is more directivity of the wind detection device 101 with respect to the direction of the airflow from the rear of the bicycle B toward the bicycle B. Lower. The results are summarized as shown in FIG. That is, 90 degrees and 270 degrees of the wind detection apparatus 101 in the second embodiment, that is, the directivity with respect to the side of the wind detection apparatus 101 is 90 degrees and 270 degrees of the wind detection apparatus 1 in the first embodiment. Weaker than directivity.

Further, in the present embodiment, the surface direction of the outlet 111B and the wind direction of an air flow such as wind moving from the rear of the bicycle B toward the bicycle are parallel to each other. Therefore, the air flow hardly flows into the flow path 111 from the outflow port 111B from the outflow port 111B of the wind detection device 1 orthogonal to the airflow direction of the air flow. Accordingly, the wind detection device 101 is stronger in the rear of the bicycle B, that is, the directivity of 180 degrees than the wind detection device 1 (see FIG. 5). Further, in the present embodiment, the cross section of the flow path 111 is the same from the inlet 111A to the detection port 113. Therefore, in this case, the velocity of the air flow that decreases to the detection port 113 is smaller than that in the first embodiment in which the cross section of the flow passage 11 is enlarged from the inlet 11A to the detection port 13. Therefore, the direction of the wind detection apparatus 101 with respect to the direction opposite to the advancing direction of the bicycle B is higher in the case of the present embodiment (see FIG. 5).

(Embodiment 3)
Next, a third embodiment of the present invention will be described. The description of the same reference numerals and names as those in Embodiment 1 is omitted. The moving body measuring device 300 includes a wind detecting device 201 that measures sound, a display device 102 that displays preset items, and a main body portion 300a in which an input device 103 is integrated into a main body 210, and And an attachment portion 100b for fixing the main body portion 300a to the bicycle B.

A wind detection device 201 is provided in a range in front of the bicycle B from the display unit 21 of the main body 210. The wind detection device 201 generates sound (vibration) from the air flow on the upstream side of the flow path 211 through which an air flow such as wind circulates, the sound (vibration) is measured, and the sound detector 212. A detection port (sound generating means) 213 is provided.

The flow path 211 is configured by a hole formed by bending from the front end surface of the main body 210 to the bottom surface to which the attachment portion 100b of the main body 300b is connected. This flow passage 211 is branched into a plurality (in this embodiment, two) in the middle. The portion of the hole formed in the end surface of the main body 210 constitutes the inlet 211A of the flow passage 211, and the portion of the hole formed in the bottom surface of the main body 210 constitutes the outlets 111B and 111C of the flow passage 111. To do. The flow passage 111 is surrounded by the main body 210 in the entire circumferential direction with respect to the central axis C3. Accordingly, an air flow such as wind coming from the front toward the measurement apparatus 300 while the bicycle B is traveling enters from the inflow port 211A, passes through the flow path 211, and flows out from the outflow port 211B and the outflow port 211C.

In the present embodiment, the inflow port 211A has a substantially rectangular shape, and the

outflow ports

211B and 211C have a substantially elliptical shape. Further, the outlet 211B and the outlet 211C are wider than the inlet 211A. That is, the cross section of the flow passage 211 is generally enlarged from the front side toward the rear side. In the present embodiment, the cross section of the flow passage 111 gradually expands toward the branch point, and the cross sections of the flow passage 111 from the branch point to the outlet 211B and the outlet 211C are constant.

The flow passage 211 is locally branched in a T-shape, and a central axis C3 at the branch point from the inflow port 211A (hereinafter referred to as “the front portion of the central axis C2”) is a straight line, and the branch point The central axis C3 (hereinafter referred to as “the rear portion of the central axis C3”) at the outlet 211B and the outlet 211C has a curved portion. The rear part of the central axis C3 is parallel to the bottom surface of the main body 210 and is orthogonal to the front part of the central axis C3. Further, the rear portion of the central axis C3 extends linearly from the branch point toward both side surfaces of the main body 210, and further extends linearly toward the outside of the bicycle B and obliquely rearward and upward with the curved portion interposed therebetween. As a result, the

outlets

211B and 211C are formed across the surface and side surfaces.

A sound measuring device 212 and a detection port 213 are provided in a portion from the inlet 211A to the branch point of the flow passage 211. That is, the sound measuring device 212 and the detection port 213 are disposed between the bottom surface of the main body 10 where the display unit 21 and the operation unit 31 are provided and the portion of the flow passage 211 from the inlet 211A to the branch point. Yes.

As long as the sound measuring device 212 can measure sound (vibration), its structure and shape are not particularly limited. In the present embodiment, a MEMS microphone packaged in a flat plate shape is used as the sound detector 212.

Further, the detection port 213 is formed from the hole wall near the sound detector 212 of the flow passage 211 to the mouth portion (not shown, hereinafter referred to as “sound port”) for collecting the sound of the sound measuring device 212. That is, the flow path 211 and the sound port of the sound detector 212 are communicated with each other by the detection port 213. Therefore, the airflow flowing toward the bicycle B flows into the flow passage 211 from the inflow port 211A and circulates through the flow passage 211 toward the

outflow ports

211B and 211C. At this time, when the air flow passes through the detection port 213, turbulent flow (aerodynamic noise) is generated and moves in the detection port 213 toward the sound measuring device 212. As a result, the sound measuring device 212 measures turbulence generated by an air flow such as wind as sound.

Since both the outlet 211B and the outlet 211C are wider than the inlet 211A, as in the case of the first embodiment, the cross-section of the flow passage 211 is expanded as a whole along the flow of the air flow. The flow path 211 is different in that it is branched in the middle and extends toward the side surface. Thus, for the wind from the rear of the bicycle B, the directivity of the wind detection device 101 with respect to the rear (180 degrees) of the bicycle B can be suppressed for the same reason as in the second embodiment ( (See FIG. 5). On the other hand, the effect from the side of the bicycle B is the same, but the reason for the effect is different. That is, when the air flow moving from the side of the bicycle B toward the bicycle B flows in from the one outlet 211B (or 211C), the air flows basically through the rear portion of the flow passage 211 and the other Outflow from the outlet 211C (or 211B). That is, the airflow flowing in from any one of the

outlets

211B and 211C passes through the detection port 213, and turbulence (wind noise) is not generated or hardly occurs. Therefore, also in the present embodiment, as in the case of the second embodiment, there is an effect that the directivity with respect to the side (90 degrees and 270 degrees) of the bicycle B of the wind detection device 201 can be suppressed (FIG. 5). In addition, since a predetermined volume can be secured between the hole wall of the flow path 211 and the surface on which the display unit 21 is provided, for example, a component having another function such as a GPS antenna can be efficiently used. It can also be arranged.

As described above, the wind detection devices 1, 101, and 201 of the present invention include the inlets 11 A, 111 A, and 211 A that allow an air flow to flow in, the outlets 11 B, 111 B, 211 B, and 211 C that allow an air flow to flow out. 11A, 111A, 211A and

air outlets

10, 110, 210 comprising

flow passages

11, 111, 211 closed in the circumferential direction that communicate with the

outlets

11B, 111B, 211B, 211C and circulate the air flow; The

sound measuring devices

12, 112, and 212 are arranged in the

flow passages

11, 111, and 211 and measure sound. The sum of the

inflow ports

11B, 111B, 211B, and 211C is wider than the sum of the

inflow ports

11A, 111A, and 211A. Therefore, by making the direction orthogonal to the

inflow ports

11A, 111A, and 211A coincide with the direction in which the moving body moves forward, the directivity of the

sound measuring devices

12, 112, and 212 is made to be the moving direction of the moving body such as the bicycle B. (Forward and backward), in particular, it can be strengthened in the direction from the front of the moving body toward the moving body. Note that “the direction orthogonal to the

inflow ports

11A, 111A, 211A and the direction in which the moving body moves forward” is preferably three-dimensional (spatially), but two-dimensional (planar) perpendicular to the vertical direction. )).

Further, the wind detection devices 1, 101, 201 have sound generating means 13, 113, 213 for generating sound from the air flow between the

inlets

11A, 111A, 211A and the

sound measuring devices

12, 112, 212. There is a case. In this case, sound is generated in the flow path that is closed in the circumferential direction with respect to the direction in which the air flow flows (the axial direction of the air flow) and on the upstream side of the

sound measuring devices

12, 112, and 212. Therefore, it is possible to measure the sound corresponding to the air flow flowing through the

flow passages

11, 111, 211 while eliminating the sound generated outside the wind detection devices 1, 101, 201. As a result, the accuracy of the values measured by the

sound measuring devices

12, 112, 212 can be increased.

Also, the

outlets

11B, 111B, 211B, and 211C may be inclined with respect to the

inlets

11A, 111A, and 211A. Here, when the direction orthogonal to the

inflow ports

11A, 111A, and 211A and the direction in which the moving body moves forward are matched, the

outflow ports

11B, 111B, 211B, and 211C become the direction of the air flow that moves toward the moving body. Inclines against. Accordingly, the airflow flowing into the

flow passages

11, 111, 211 from the

flow inlets

11A, 111A, 211A moves toward the

flow outlets

11B, 111B, 211B, 211C while securing an area as a discharge port to be discharged. The projected area with respect to a plane perpendicular to the direction of the airflow is reduced. Therefore, it is possible to suppress the functions of the

outlets

11B, 111B, and 211B that guide the airflow that moves toward the

outlets

11B, 111B, and 211B to the

flow passages

11, 111, and 211. Therefore, it is possible to suppress a decrease in directivity of the

sound measuring devices

12, 112, and 212 in the direction from the front of the moving body toward the moving body.

The direction of the

flow paths

11, 111, 211 changes between the portions of the

flow paths

11, 111, 211 that are spatially connected to the

sound measuring devices

12, 112, 212 and the

flow outlets

11B, 111B, 211B, 211C. There is a case. In this case, the air flow flowing into the

flow passages

11, 111, 211 from the

outlets

11B, 111B, 211B is spatially connected to the

sound measuring devices

12, 112, 212 of the

flow passages

11, 111, 211. It can be attenuated before reaching. Therefore, it is possible to suppress a decrease in directivity of the

sound measuring devices

12, 112, and 212 in the direction from the front of the moving body toward the moving body. In the first to third embodiments, the portions of the

flow passages

11, 111, 211 that are spatially connected to the

sound measuring devices

12, 112, 212 are the

flow passages

11, 111, 211 and the detection port 13. , 113 and 213 correspond to the overlapping portion.

In the first to third embodiments, the sound level (vibration amplitude) is measured by the

sound measuring devices

12, 112, and 212 of the wind detection devices 1, 101, and 201. The moving body measuring devices 100, 200, and 300 calculate the relative velocity of the air flow with respect to the bicycle B (hereinafter referred to as “opposing wind velocity”) based on the measurement values measured by the

sound measuring devices

12, 112, and 212. . For example, the moving body measuring devices 100, 200, and 300 include a wind speed calculation unit that is electrically connected to the

sound measuring devices

12, 112, and 212. The wind speed calculation unit includes at least a CPU that performs predetermined calculation processing, a table or graph in which a measurement value that is a loudness and an opposing wind speed are associated with each other, and a ROM that stores a predetermined program. It consists of a mounted board.

When the sound volume measured by the

sound measuring devices

12, 112, and 212 is converted into an electrical signal and output to the wind speed calculation unit, the CPU of the wind speed calculation unit is opposed based on a program, table, or the like stored in the ROM. The speed is calculated and the calculated value is displayed on the display unit 21. Further, the CPU of the wind speed calculation unit or another CPU may calculate predetermined items such as a moving distance in the atmosphere based on the calculated value and display the predetermined items on the display unit 21. Further, the moving body measuring devices 100, 200, and 300 have information input by the input means 3, speed sensors and acceleration sensors provided in addition to the

sound measuring devices

12, 112, and 212, GPS, and the like (not shown). It is also possible to calculate a value other than the moving distance in the atmosphere and the facing speed based on the information sent from and display on the display unit 21.

(Other embodiments)
In Embodiments 1 to 3, the

main bodies

10, 110, and 210 in which the wind detection devices 1, 101, and 201 are incorporated constitute the air guide body of the present invention. In the

main bodies

10, 110, and 210, a substrate for calculating the wind speed, the display device 2, and the input device 3 are also incorporated and integrated. That is, the

main body

10, 110, 210 is provided with functions other than the wind detection devices 1, 101, 201 having a sound measurement function on the premise that the wind speed is measured, so that unitized measurement for a moving body is performed. The devices 100, 200, and 300 are established. However, it is not always required to be unitized. For example, a part or all of measuring instruments for measuring physical quantities as parameters necessary for calculating predetermined information such as the opposing speed are integrated into a unit. It is also possible to attach a portable information terminal such as a mobile phone that can receive data from a measuring instrument and calculate predetermined information to a mobile body such as a bicycle. Furthermore, a storage medium is connected to the unitized unit, and data can be stored in the storage medium, and after the data is collected, the storage medium is connected to a stationary information terminal, and predetermined information is obtained. Can also be calculated.

In the first to third embodiments, the moving body measuring devices 100, 200, and 300 in which the wind detection device is incorporated are attached to the handle B1 of the bicycle B. It can be attached to the driver's body or helmet. It is also possible to attach the moving body measuring devices 100, 200, and 300 to other moving bodies such as motorcycles and automobiles. Furthermore, the moving body measuring apparatus 100, 200, 300 can be attached to a person and used for walking, running, skiing, or skating.

Further, in the first to third embodiments, the

main bodies

10, 110, and 210 are configured as a single body (non-dividable structure), but the wind detection devices 1, 101, and 201 of the

main bodies

10, 110, and 210 are configured. It is also possible to make it possible to separate the part provided with the other parts. In this way, if the main body can be separated for each function, when only a part of the functions breaks down, the running cost of the mobile measuring devices 100, 200, 300 can be suppressed by replacing only the part of the functions.

In the first to third embodiments, since the display device 2 functions as a part of the user interface, the moving body measuring devices 100, 200, and 300 can be visually recognized from the driver such as the handle B1. Although it is necessary to attach to a position, if the audio | voice apparatus which outputs an audio | voice is used instead of the display apparatus 2, it can also be attached to the position which cannot be visually recognized. In this case, the degree of freedom of the attachment position increases, and the degree of freedom of the shape of the

main body

10, 110, 210 and the structure of the attachment portion 100b also increases. In addition, air resistance can be reduced by eliminating exposure by the display unit or the like.

Furthermore, the material of the

main body

10, 110, 210 is not particularly limited, and is appropriately set. Moreover, although the

sound measuring device

12, 112, 212 is comprised by the MEMS microphone, it is not limited to this, The instrument which consists of another structure which can measure the magnitude | size of the turbulent flow of air may be sufficient.

In the first to third embodiments, the

sound measuring devices

12, 112, 212 and the

detection ports

13, 113, 213 are disposed in the

main bodies

10, 110, 210, but the

flow passages

11, 111, 210, It may be configured to protrude from the hole wall 211. Further, the shapes of the cross sections of the

inflow ports

11A, 111A, 211A, the

outflow ports

11B, 111B, 211B, 211C, and the

flow passages

11, 111, 211 are not particularly limited. Also, the shape of the central axis is not limited to the case of the first to third embodiments.

In the first to third embodiments, a set of

sound measuring devices

12, 112, 212 and

detection ports

13, 113, 213 are provided for one

flow path

11, 111, 211. However, a plurality of sets of sound measuring devices and detection ports may be provided. That is, a plurality of sounds can be measured, and a representative value such as an average value or a median value can be calculated. By using the representative value, the abnormal value can be eliminated and the non-uniformity is reduced, so that the accuracy of the measured wind speed can be improved.

Furthermore, in Embodiment 1 to Embodiment 3, one wind detection device 1, 101, 201 is provided for one bicycle B, but a plurality of wind detection devices may be provided. For example, the second moving body measuring device having a main body portion and a mounting portion, which is a main body in which only the wind detection device is incorporated, is installed on the seat post with the inlet facing the rear of the bicycle. Also good. In this way, by installing the wind detection device behind the driver, the wind (following wind) from the rear of the bicycle B toward the bicycle B can be measured while blocking the wind blowing from the front by the driver. it can. As a result, the predetermined information such as the moving distance in the atmosphere can be calculated more accurately. In addition, when the 2nd moving body measuring device is provided, it is desirable for the 2nd moving body measuring device to have a structure which can transmit a measured value to the main-

body parts

100a, 200a, 300a wirelessly.

DESCRIPTION OF SYMBOLS 1 Wind detection apparatus 2 Display apparatus 3 Input apparatus 10 Main body 11 Flow path 11A Inlet 11B Outlet 12 Sound measuring device 13 Detection port (sound generation means)
21 Display unit 31 Operation unit 100 Measuring device for moving body 100a Main body unit 100b Mounting unit 101 Wind detection device 110 Main body 111 Flow path

111A Inlet port

111B Outlet port 112 Sound measuring device 113 Detection port (sound generating means)
200 Measuring Device for Moving Body 200a Main Body 201 Wind Detection Device 210 Main Body 211 Flow Path 211A Inlet 211B Outlet 211C Outlet 212 Sound Measuring Device 213 Detection Port (Sound Generation Means)
300 Measuring Device 300a for Moving Body Main Body B Bicycle B1 Handle

Claims

An air inlet into which air flows in, an air outlet through which air flows out, and an air guide body including an inflow path that communicates with the inflow port and the outflow port to circulate air;
A sound measuring device arranged in spatial connection with the flow path and measuring sound;
The flow passage is closed in a circumferential direction relative to its length direction;
The wind detection device, wherein the outlet is wider than the inlet.
A wind detecting device characterized in that sound generating means for generating sound from the air flowing through the flow passage is provided between the inlet and the sound measuring device.
The wind detection device according to claim 1 or 2, wherein the outlet is inclined with respect to the inlet.
The wind according to any one of claims 1 to 3, wherein a direction of the flow passage is changed between a portion of the flow passage that is spatially connected to the sound measuring device and the outlet. Detection device.