JPH06100612B2 - Wind direction detecting device and method for attaching wind direction detecting device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a wind direction detection device and a method for mounting a wind direction detection device, for example, a vehicle traveling by detecting a wind from a lateral direction with respect to a vehicle. It is applied to a device for controlling the stability of.

[Conventional technology]

Conventionally, as a wind direction detection mechanism of a wind direction detection device, firstly, a wind direction is detected by a mechanical displacement of an impeller or the like, and secondly, a wind direction is dynamically detected by using a peat tube or the like. To be detected by heat transfer (for example, JP-A-57-
Fourth, there is one that uses ultrasonic waves for detection.

[Problems to be Solved by the Invention]

However, the conventional wind direction advancing device has the following problems, that is, the first wind direction detecting device has a movable part associated with mechanical displacement and therefore has a problem in durability and accuracy. .

The second wind direction detection device has a problem that the detection range is narrow.

The third wind direction detection device requires a plurality of thermal airflow meters, is easily affected by the outside, and has a problem in accuracy.

In the fourth wind direction detection device, a plurality of detection devices for detecting ultrasonic waves are required, and the device is a plurality, large-sized, and very expensive in terms of cost.

Each of them is a device having a problem in weather resistance, particularly raindrop resistance, when it is mounted outdoors of a vehicle such as a vehicle.

It is an object of the present invention to provide a wind direction detecting device and a wind direction detecting device mounting method which are excellent in weather resistance, particularly raindrop resistance when mounted outdoors of a vehicle such as a vehicle.

[Means for solving problems]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a wind velocity measuring member having an external pressure extraction path that is partially opened to derive the external atmospheric pressure, and an external pressure extraction member that is partially opened to derive the external atmospheric pressure. Two wind direction measuring members I and II, a pressure detecting means I connected to the outside air pressure outlet of the wind speed measuring member, and two outside air pressure outlets of each of the two wind direction measuring members. The pressure direction detecting means II and the wind speed signal from the pressure detecting means I and the pressure detection signal from the pressure detecting means II for printing the wind pressure or the wind pressure difference are input to detect the wind direction. At least a calculating means, the wind speed measuring member and the wind direction measuring members I and II, the pressure detecting means I and the pressure detecting means II can be housed, and the measured wind direction and wind speed are the wind speed measuring member and the wind direction measuring means. Each of members I and II And a applicator having a Kazeguchi substantially capable of transmitting to the outer pressure extraction path, is configured, the wind velocity measuring member and the wind direction measuring member I, II
Are arranged at a predetermined distance, and the wind direction measuring members I and II are arranged in line symmetry with respect to the opening direction of the wind speed measuring member. The wind direction detection device is arranged in line symmetry with respect to the opening direction of the wind speed measurement member, and the signal related to the wind speed is a signal based on the measurement of the opening direction component of the wind speed measurement member. Furthermore, when attaching to a dynamic object, the wind direction detecting device is attached so that the opening direction of the wind velocity measuring member is substantially opposite to the traveling direction of the dynamic object. The wind direction detecting device mounting method is adopted.

[Action effect]

In the present invention, in particular, there are two wind speed measuring members that are provided with an outside air pressure extraction passage that is partially opened to derive the outside air pressure and an outside pressure extraction passage that is partially opened to derive the outside air pressure. The respective openings provided in the wind direction measuring members I and II are
The direction of the wind entering from the wind outlet is arranged so that the opening direction of the wind speed measuring member and the opening directions of the wind direction measuring members I and II are opposite directions, and the wind speed measuring member and the wind direction measuring member I, II, the pressure detecting means I, and the pressure detecting means II are provided in a case that can be housed at least, so that there is an effect of preventing foreign matter such as raindrops, dust, and dust from invading from the opening, which affects measurement accuracy. Thereby, there is an effect that it is possible to provide a wind direction detection device having excellent weather resistance, particularly raindrop resistance.

In addition, when attaching to a dynamic object, since the opening direction of the wind speed measuring member is substantially opposite to the traveling direction of the dynamic object to which the wind direction detecting device can be attached, It has an effect of preventing foreign matter such as raindrops, dust, and dust that may affect the measurement accuracy from entering through the opening. As a result, there is an effect that it is possible to provide a method of attaching the wind direction detecting device that is excellent in weather resistance, particularly raindrop resistance.

〔Example〕

Hereinafter, a first embodiment of the present invention will be described with reference to the drawings.
1 and 2 are configuration diagrams showing an optimum embodiment of the present invention, FIG. 1 is a configuration diagram showing a partial configuration arrangement of a wind direction detecting device, and a sectional view taken along the line AA of FIG. 2 is a sectional view taken along the line BB in FIG.

As shown in FIG. 1, a wind speed measuring cylinder 1 which is a wind speed measuring member which is a wind receiving member and wind direction determining cylinders 2 and 3 which are wind direction measuring members I and II are arranged so that the side surface thereof is hit by the air flow. On the side surface of the wind velocity measuring cylinder 1 on the downstream side of the air flow (wind), a notch groove or a pressure outlet 4a opening downstream is provided so that raindrops and the like are less likely to enter. This pressure outlet 4a
Communicates with a compression outlet 4 which is an outside air pressure outlet provided on the upper end surface of the wind velocity measuring cylinder 1. The compression outlet 4 is connected to a semiconductor pressure detector 10 which is a pressure detecting means I through a pressure outlet pipe 4b. It is connected.

The wind direction discriminating cylinders 2 and 3 are arranged so as to be symmetrical with respect to the straight line B-B axis extending to the downstream side along the pressure outlet 4a of the wind velocity measuring cylinder 1 and apart from the cylinder 1 by a predetermined distance D. There is. The wind direction determining cylinders 2 and 3 are provided with pressure inlets 5a and 6a formed in the same manner as the wind speed measuring cylinder 1 and pressure outlets 5 and 6 which are external atmospheric pressure outlets, respectively. 5,6
Is one pressure detecting means II via the pressure derivation pipes 5b, 6b.
Is connected to the pressure detector 11. This pressure detector
Reference numeral 11 generates an electric signal according to the difference in pressure introduced from the pressure extraction paths 5 and 6. However, the pressure introducing ports 5a and 5b are open on the side opposite to the wind velocity measuring cylinder 1 toward the downstream side surface of the air flow.

Here, the diameter d of the wind speed measuring cylinders 1, 2, 3 and the wind speed measuring cylinder 1
The predetermined distance D between the wind direction determining cylinders 2 and 3 and the opening angle α of the wind direction determining cylinders 2 and 3 with the center of the wind speed measuring cylinder 1 as the vertex are experimentally optimum conditions (as shown in FIG. 3). The negative pressure corresponding to the wind direction θ is determined by obtaining the condition (generation condition on the rear surface on the downstream side of the wind velocity measuring cylinder 1), and in this example, d =
20 mm, D = 32.5 mm, α = 82 °, and the width of the pressure introducing ports 4a, 5a, 5b is set to about 40% of the diameter D. The wind speed measuring cylinder 1 and the wind direction determining cylinders 2 and 3 are attached to the upper flow path plate 7 of the flow path plates 7 and 8 forming the U flow path as shown in FIG. Further, there is provided a gap between the lower ends of the wind speed measuring cylinder 1, the wind direction measuring cylinders 2 and 3 and the lower flow path plate 8 to the extent that water droplets are not blocked. As shown in FIG. 2, the flow path plate 8 is supported by the four shafts 13 in parallel between the flow path plate 7 of the case 14 and the lower end plate 9.
The lower end plate 9 is fixed to the center of the roof of the vehicle. Also,
On the lower side of the flow path plate 8, a wind speed measuring cylinder 15 and a pressure derivation path 16 are provided, and the pressure derivation path 16 penetrates the wind speed measurement column 1 and is provided in the case 14 for pressure detection. Connected to the container 10.

The diameters of the wind speed measuring cylinder 1, the wind direction determining cylinders 2 and 3 and the sizes, the predetermined distance D between the wind speed measuring cylinder 1 and the wind direction determining cylinders 2 and 3, the size of the opening angle α, and the pressure outlets 4a, 5a and 6a. The size does not necessarily have to be as in this embodiment.

Next, the operation will be described based on the above configuration.

The rear surface pressure Pd of the wind velocity measuring cylinder 1 shown in FIG. 1 can be taken out by the wind U having the wind direction θ. The wind direction θ is B-
The arrow side in FIG. 1 is positive with respect to the line B, and the opposite side is negative.
Here, suppose that there is no wind direction discriminating cylinders 2 and 3, but a wind speed measuring cylinder 1
In this case, the negative pressure Pd taken out from the pressure outlet 4a is constant irrespective of the wind direction θ due to separation of the air flow. However, if the right and left discriminating cylinders 2 and 3 are placed, the pressure rises due to the effect of the stagnation of the flow when the absolute value of the wind direction θ is small, and the pressure is reduced because the flow is throttled when the absolute value of the wind direction θ is large. Decrease. As a result, the rear surface pressure Pd of the wind speed measuring cylinder 1 taken out from the pressure outlet 4a is obtained as a negative pressure according to the absolute value of the wind direction θ as shown in FIG. FIG. 3 is symmetrical about the wind direction θ = 0 °, and the absolute value of the wind direction can only be detected as the wind speed.

Therefore, the rear surface pressure P ₁ , P ₂ on the downstream side of the wind direction determining cylinders 2, 3
Is taken out from the pressure take-out paths 5 and 6, and the difference (P ₁ -P ₂ ) is obtained, as shown in Fig. 4. From Fig. 4, the wind direction determination cylinder
When the difference between the rear surface pressures of 2 and 3 (P ₁ −P ₂ ) is negative, the wind direction θ is positive, that is, the wind direction from the arrow direction in FIG. ₁ (P ₁ −P ₂ ).
When is positive, it can be determined that the wind direction θ is negative. Therefore, Pd, P ₁ and P ₂ of the wind velocity measuring cylinder 1 and the wind direction determining cylinders 2 and 3 are detected from the pressure extraction paths 4, 5 and 6 of the wind velocity measuring cylinder 1 and the wind direction determining cylinders 2 and 3 by a semiconductor pressure sensor or the like. If measurement is performed using the devices 10 and 11, the wind direction can be detected at a constant wind speed based on these measured values and a preset map. Since the wind speed is not always constant in practical use, it is necessary to make a correction corresponding to the wind speed.

In the above embodiment, particularly the wind speed measuring cylinder 1, the wind direction determining cylinder 2, 3
Since the rear surface pressure is a negative pressure, raindrops, dust, dust, etc. do not enter the pressure outlets 4, 5, 6 and, as shown in FIG. 2, the flow path plate 8 and the cylinders 1, 2, 3 are Since there is an optimal gap between them, raindrops, dust, dust, etc. will not get stuck. In addition, as shown in FIG.
Since a, 5a and 6a are large enough to take out the surface pressure from the cylinder toward the rear, raindrops, dust, dust, etc. do not get stuck there. Therefore, it is possible to secure the measurement accuracy superior to the conventional one.

Fig. 3 also shows the data obtained by measuring the wind direction in the rain.
Rainfall is 4.2 mm / min. As can be seen from FIG. 3, the result in the rain is such that the negative pressure slightly decreases but does not affect the actual detection, and this example is excellent in weather resistance, particularly raindrop resistance. Is shown.

Next, FIG. 5 shows a measuring circuit in the case of using a semiconductor pressure sensor as a pressure detector in the present embodiment. The electronic control unit (ECU) 19 includes an analog power supply 20, a digital power supply 11, an amplifier / filter circuit 22-1 and an A / D converter 22.
-2 amplifier / filter unit 22, D / A converter 2
3 and a microcomputer 24. The current input from the power supply terminals 25-1 and 25-2 of the electronic control unit is output from the analog power supply 10 by the output terminals 26-1, 26-2
Is supplied as a constant voltage current to the semiconductor pressure sensor which is the pressure detector 11 in the wind direction sensor 32 which is composed of the wind velocity measuring cylinder 1, the wind direction determining cylinders 2 and 3, and the pressure detector 11. The analog power supply 20 also supplies a constant voltage current to the amplifier / filter unit 22 digital power supply 21, and the digital power supply 21 supplies the operating current of the microcomputer 24. The output from the wind direction sensor 32 is divided into a wind speed output obtained by measuring the rearward pressure Pd of the wind velocity measuring cylinder 1 and a wind direction discriminating output obtained by measuring the difference between the rear surface pressures of the wind direction discriminating cylinders 2 and 3. Input terminals 27, 28 of electronic control unit 19
Enter more Also, the cylinder 15 for measuring the wind speed and the pressure derivation path 16
And a pipe (not shown) connecting the pressure derivation path 16 and the pressure detector, and the pressure detector. Wind speed detector
The output from 33 enters input terminal 29. The signals input from the input terminals 27, 28 and 29 are input to the microcomputer 24 as a digital signal through the amplifier filter unit. The microcomputer uses the wind speed output signal from the wind direction sensor 32, the wind direction determination output signal, and the wind speed output signal from the wind speed detector 33.
The two signals are calculated and processed, and the output signals for wind speed and left / right discrimination are output as digital signals. Its output is D / A converter 2
It is converted into an analog signal by 3 and output from the output terminals 30 and 31.

Next, a method of calculating the wind direction in this embodiment will be described. First, in the wind direction determination, the sensor output value A when the wind direction angle is 0 ° is stored in the memory in advance. FIG. 6 is a calculation flowchart for determining the wind direction. The calculation is started from step 122. In step 123, the wind direction determination output, that is, (a) of the difference (P ₁ −P ₂ ) between the rear surface pressures of the wind direction determination cylinders 2 and 3 is used.
The output value B from the semiconductor pressure sensor which is the detector 11 to be read is read. In step 124, when it is determined that the value A when the wind direction angle is 0 ° and the measured output value B are the same, the process proceeds to step 128, where the wind direction is 0 ° (sign ±) and the process proceeds to step 129. When it is determined in step 124 that the measured output value B is not the same as the value A when 0 °, the process proceeds to step 125. In step 125, it is judged whether the measured output value B is smaller than the value A when the angle is 0 °. When it is determined that the measured output value B is larger than the value A when the angle is 0 °, the process proceeds to step 126 and the wind direction is set to the left (sign ±) and step 129 is performed.
Proceed to. When it is determined in step 125 that the measured output value B is smaller than the value A when the angle is 0 °, the routine proceeds to step 127, where the wind direction is right (sign −) and the routine proceeds to step 129. In step 129, the result of the previous step is output and the process returns to step 123 to perform the next measurement.

Next, in the wind direction angle measurement, the wind direction angle θ at each wind speed U is set in advance.
The output data of is stored in the memory as a two-dimensional map. An example of a two-dimensional map is shown in FIG. 7, and a calculation flowchart is shown in FIG. The calculation of the wind speed starts from step 130. In step 131, the measured wind speed value U is read, and in the next step 132, the wind direction angle output, the immediate pressure wind speed measurement semiconductor pressure sensor which is a pressure detector based on the rear surface pressure Pd of the cylinder 1.
Read 10 outputs. In step 133, the angle is calculated by tracing the two-dimensional map as shown in FIG. 7 based on the wind speed data and the wind direction data. The map of FIG. 7 is created in advance by detection and stored in the memory, but since the map points are discrete, there is a gap between the map points.
In step 133, interpolation calculation is performed to obtain. In step 134, the calculated angle θ is output, and the process returns to step 131 to perform the next measurement.

It is used to control the stability of vehicle running by detecting the wind from the lateral direction while the vehicle is running by the wind direction signal (eg + 30 °, -25 °) obtained by synthesizing the signals output in this way. it can.

FIG. 9 shows a second embodiment. In the first embodiment, the pressure outlet is directly connected to the wind speed measuring cylinder and the wind direction determining cylinder, but in this embodiment, the air gap 37 is provided in the upper part of the wind speed measuring cylinder 35, and the pressure outlet 36 is provided in the upper part thereof. There is mounting. In addition, the void 37
There is a net 38 inside. By providing this void 37, raindrops or liquids with a higher viscosity,
Dust, dust, etc. will not block the pressure outlet, and stable pressure can be taken out even in an airflow having a rapid pressure fluctuation that is unnecessary for measurement. The net inside the void 37 also has the effect of preventing the pressure outlet from being blocked by raindrops, dust, dust, or the like.

In the second embodiment, the pressure take-out passage 36 is vertically attached to the center of the upper portion of the space 37, but this may be provided on the side surface or may be attached obliquely. In short, if the pressure inside the space 37 equal to the rear surface pressure on the downstream side of the wind velocity measuring cylinder 35 can be taken out, attach a pressure outlet of which position, posture, shape and size. Is also good. In addition, although the net is provided inside the gap in the present embodiment, the aperture ratio of the net may be changed depending on the size of raindrops, dust, and dust contained in the measured airflow. However, it is necessary that at least the gas pressure can be taken out from the pressure outlet 36.

Next, a third embodiment in which the present apparatus is attached to the tip of an antenna rod will be described with reference to FIGS. 10 to 12.

50 is an antenna rod, the lower end 50a of which is supported by a support case 51 fixed to a part of the vehicle body, and the rod 50
Is attached by a bolt 52 so that it can be laid sideways in the front-rear direction of the vehicle body. A case 53 for detecting the wind direction and speed is fixed to the upper end 50b of the rod 50.

The case 53 is formed with a flow path partitioned by flow path plates 54 and 55, 56, 57, and the lower surface of the flow path plate 54 is provided with the same wind speed measuring cylinder 15 as in the above-described embodiment, and the flow path plate. A wind velocity measuring cylinder 1 and wind direction determining cylinders 2 and 3 are formed on the lower surface of 56.

In addition, a pressure derivation path that derives the pressure in the cylinder 15 for wind speed measurement.
16 is guided to a semiconductor pressure detector 61 provided in the support case 51 via a pressure lead pipe (not shown). This pipe passes through the pipe 60 formed in the detection case 53 and the antenna rod 50 and is arranged up to the support case 51. Similarly, the pressure lead-out path 4 for leading out the rear surface pressure of the wind velocity measuring cylinder 1 is led out to the pressure detector 62 in the support case 51 via the pressure lead-out pipe. Similarly, the pressure derivation path for deriving the rearward pressure of the wind direction determination cylinders 2 and 3 is also derived to the pressure detector 63 in the support case 51 via the pipe. The operation of this embodiment is the same as that described above, and will be omitted.

As described above, by providing only the detection case 53 on the upper end of the antenna rod 50, it is possible to prevent detection of turbulence caused by wind hitting the vehicle body, and more accurate wind direction,
The wind speed can be detected. Further, the pressure detector 61 which is the pressure detecting means and the pressure detectors 62 and 5 which are the pressure detecting means II.
Since it is housed in 1, the detection case 50 attached to the upper end of the antenna rod 50 can be made smaller and lighter.

Further, in the above-described embodiment, the wind direction determining cylinders 2 and 3 serving as the wind direction measuring members are cylindrical, but by using columnar members having other shapes, the wind direction θ is formed on the rear surface of the wind speed measuring cylinder 1. You may make it generate | occur | produce the negative pressure corresponding to.
Further, the wind velocity measuring cylinder 1 serving as a wind receiving member may have another shape so as to generate the negative pressure as described above.

[Brief description of drawings]

1 and 2 are views showing a first embodiment of the present invention, wherein FIG. 1 is a sectional view taken along the line AA in FIG. 2, and FIG. 2 is a line BB in FIG. Sectional view along the line, Fig. 3 shows wind direction θ
And the rear surface pressure (Pd) of the wind velocity measuring cylinder (1). Fig. 4 shows the difference between the wind direction θ and the rear surface pressure (P ₁ , P ₂ ) of the wind direction determining cylinder (2, 3). 5 is a characteristic diagram showing the relationship between
FIG. 6 is a block circuit diagram showing an electric circuit of the wind direction detecting device, FIG. 6 is a flow chart showing a processing procedure of wind direction determination in the microcomputer (24), and FIG. 7 is stored in advance in the microcomputer (24). FIG. 8 is a map showing a two-dimensional map, FIG. 8 is a flow chart showing a processing procedure for calculating the wind direction angle θ in the microcomputer (24), and FIG.
10 is a sectional view showing a third embodiment, FIG. 11 is a sectional view taken along the line CC of FIG. 10, and FIG. 12 is a line DD of FIG. FIG. 1 …… Wind speed measuring cylinder (wind speed measuring member), 2, 3 …… Wind direction discriminating cylinder (wind direction measuring member), 4,5, 6 …… Pressure outlet (outside air pressure outlet), 7, 8 …… Flow path plate .

Claims (4)

[Claims] 1. A wind velocity measuring member having an outside air pressure outlet for opening the outside air pressure to be partially opened and an outside air pressure outlet for opening the outside air pressure to be released. Members I and II, pressure detection means I connected to the outside air pressure outlet of the wind measurement member, pressure detection means II connected to the outside air pressure outlet of each of the two wind direction measurement members, A wind direction calculation unit for detecting a wind direction by inputting a signal related to the wind speed from the pressure detection unit I and a signal related to the wind pressure or the wind pressure difference from the pressure detection unit II, the wind speed measurement member, and the wind direction. At least the measuring members I and II, the pressure detecting means I and the pressure detecting means II can be housed, and the measured wind direction and wind speed can be obtained by measuring the outside air pressure of each of the wind speed measuring member and the wind direction measuring members I and II. Can be transmitted to the extraction path The air velocity measuring member and the wind direction measuring members I and II are arranged at a predetermined distance from each other, and the wind direction measuring member is arranged with respect to the opening direction of the wind velocity measuring member. I and II are arranged in line symmetry and are arranged in line symmetry with respect to the opening direction of the wind direction measuring member, and the signal related to the wind speed is a signal based on the measurement of the opening direction component of the wind speed measuring member. A wind direction detection device characterized by being present. 2. The wind direction detecting device according to claim 1, wherein the cross sections of the wind speed measuring member and the wind direction measuring members I and II are substantially circular. 3. The wind direction calculation means is provided with, as memory data, a measurement result of an opening direction component of a wind velocity measuring member and a measurement result of a wind pressure or a wind pressure difference corresponding to the opening direction component measurement result. The wind direction detection device according to claim 1, which is characterized in that. 4. The wind direction measuring device according to claim 1 is attached such that the opening direction of the wind velocity measuring member is substantially opposite to the traveling direction of the dynamic object. A method for mounting a wind direction detecting device, characterized by: