KR100255742B1 - Wind direction detecting device using light sensor - Google Patents

Abstract

PURPOSE: A wind direction measuring apparatus is provided to automatically measure the variation of wind direction and reflect on the designing of a construction by using an optical sensor. CONSTITUTION: A detector(11) detects the variation of wind direction through a rotary body rotated by wind. A rotation calculator(12) calculates the rotation direction of the rotary body using an input signal from the detector(11), and accumulates calculated values. An analog/digital converter(13) converts an output of the rotary calculator(12) into a digital signal. A measuring computer calculates a wind direction angle from the analog/digital converter(13). The detector(11) has a rotary axis, a disk connected to the rotary axis and having a number of slits at the periphery, and at least two sensors positioned at the periphery of the disk between light emitting and receiving devices and receiving light through the slits to detect the rotation of the disk.

Description

Wind direction measuring device using optical sensor

1 is a general configuration of the wind direction measuring apparatus according to the present invention.

2 is a detailed configuration of the sensing unit according to the present invention.

3 (a) and 3 (b) are explanatory views of the operation of the disc and the sensor for explaining the operation principle of the present invention.

4 is a detailed structural diagram of a sensor according to the present invention.

5 is a detailed circuit diagram of a line calculation unit according to the present invention.

6 (a) to 6 (c) are operation waveform diagrams of the rotation calculation unit according to the present invention.

* Explanation of symbols for main parts of the drawings

11 detection unit 12 rotation calculation unit

13: analog / digital converter 21: axis of rotation

22: original plate 23: printed circuit board

24 light emitting element 25 light receiving element

51: rotation direction value calculation circuit 52: rotation direction value holding circuit

53: wind direction output circuit 54: accumulator

The present invention relates to a wind direction measuring device using an optical sensor, in particular by measuring the change in the wind direction caused by the influence of the surrounding buildings at the construction point of the building and the change in the wind direction generated by the construction itself, It relates to a wind direction measuring device for reflecting in the design.

At the point where the building is to be constructed, the change of the wind direction caused by the influence of the surrounding buildings and the construction building is measured in advance, and this must be taken into account according to the degree of wind influence in the design of the building.

In the past, a passive method was used to measure this wind direction. In other words, the wind direction was estimated by placing a flag or yarn around the building model, checking the wind direction with the naked eye, or generating a gas such as smoke, and visually checking the flow of airflow.

Since the conventional wind direction measurement method only checks the rough wind direction change with the naked eye, there is a problem that the objective measurement result cannot be obtained accurately, and it is not easy to reflect it in the design of the building.

Therefore, the present invention devised to solve the problems of the prior art as described above is generated by a change in the wind direction generated by the influence of the surrounding buildings at the construction point of the building and the construction building itself through a simple configuration using an optical sensor. It is an object of the present invention to provide a wind direction measuring device for automatically measuring changes in the wind direction, which is reflected in the design of the building.

The present invention for achieving the above object, including at least two sensors, the sensing means for detecting a rotation state of the rotating body rotated by the wind; Line calculation means for calculating a rotation direction and rotation angle (rotation speed) of the rotating body using the signal sensed by the sensing means, and accumulating the calculated value; Analog / digital conversion means for converting an analog signal, which is an output of the rotation calculation means, into a digital signal; And measurement computing means for calculating a wind direction and a wind direction angle using a signal input from the analog / digital converting means, wherein the rotation calculating means includes a direction of rotation of the disc from the signal sensed by the sensing means. A rotation direction value calculating means for outputting a positive / negative signal, and an output of the rotation direction value calculating means is fed back so as to maintain the current rotation direction value until both the at least two sensors are turned off. Wind direction value output means for outputting the rotation direction and the rotation value input from the rotation direction value holding means corresponding to the rotation direction value holding means, the state section where both the sensors are turned on, and outputted from the wind direction value output means And accumulating means for accumulating the signals.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is an overall configuration diagram of the wind direction measuring apparatus according to the present invention, FIG. 2 is a detailed configuration diagram of a sensing unit of the wind direction measuring apparatus according to the present invention, and FIGS. 3 (a) and 3 (b) are views of the present invention. 4 is an explanatory diagram for explaining an operation principle, and FIG. 4 is a detailed configuration diagram of a sensor according to the present invention. Further, a detailed circuit diagram of the rotation calculation unit 12 according to the present invention is shown in FIG. 5, and the output waveforms of the circuit elements of FIG. 5 are shown in FIGS. 6 (a) to 6 (c). have.

Like reference numerals used in the present invention denote like functional units. In the figure, “11” is a sensing unit, “12” is a rotation calculation unit, “13” is an analog / digital (A / D) converter, “21” is a rotating shaft, “22” is a disk, and “23” is a printed circuit board. , “24” is light emitting element, “25” is light receiving element, “51” is rotation direction value calculation circuit, “52” is rotation direction value holding circuit, “53” is wind direction value output circuit and “54” is accumulator Represent each.

As shown in FIG. 1, the wind direction measuring apparatus according to the present invention may be largely divided into four functional units. That is, the sensing unit 11 for detecting a change in the wind direction through the rotating body rotated by the wind, and the rotation direction of the rotating body is calculated from the signal input from the sensing unit 11, and the calculated value is accumulated. A wind direction angle from the rotation calculator 12, an analog / digital converter 13 for converting the output of the rotation calculator 12 into a digital signal, and a digital signal input from the analog / digital converter 13; It consists of a measuring computer (not shown) which is shown by calculation.

Here, the sensing unit 11 is coupled to the rotary shaft 21 and the rotary shaft 21 supported to be rotatable, the object moving in accordance with the wind direction, such as a flag made of plastic or paper at the end, and a circular edge A disc 22 having a plurality of slits formed at predetermined intervals around the edge, and an edge of the disc 22 having the slit formed between the light emitting element 24 and the light receiving element 25 is positioned to the slit of the disc 22. At least two sensors for detecting the rotation state of the disc 22 by receiving the light transmitted through.

In addition, as shown in FIG. 5, the rotation calculation unit 12 includes a rotation direction value calculation circuit (51 in FIG. 5) for calculating the rotation direction of the bootie disc with the signals sensed by the two sensors. In response to the output of the direction value calculation circuit 51 to maintain the current rotation direction value until both sensors are off, the rotation direction value holding circuit 52 and both sensors correspond to the on-state section, The wind direction value output circuit 53 which outputs the rotation direction value input from the rotation direction value holding circuit 52, and the cumulative output which accumulates the signal output from the wind direction value output circuit 53 to an analog / digital converter. Group 54 is provided.

Looking at the operation of the present invention made as described above in detail.

First, the configuration and operation of the sensing unit 11 will be described with reference to FIGS. 2 to 4.

As shown in FIG. 2, an object such as a flag made of plastic moving along the wind blowing direction is coupled to the end of the rotating shaft 21, and the rotating shaft 21 is formed by a bearing (not shown). It is supported to be rotatable. A plurality of slits, which are small gaps, are formed at the edge of the disc 22, and these slits are formed at predetermined intervals (10 ° in the embodiment of the present invention) for the entire 360 °.

Thus the disk 22 is formed with a plurality of slits on the edge is strongly coupled so as not to go to a predetermined position of the rotary shaft 21. In addition, the edge of the disc is located between the light emitting element 24 and the light receiving element 25 of the sensor. That is, as shown in FIG. 4, the predetermined position of the printed circuit board 23 to which the light emitting element 24 and the light receiving element 25 are coupled is cut so that the original plate can pass through, and the upper and lower portions of the cut portion The light emitting element 24 and the light receiving element 25 are combined in the direction. Here, the light emitting device 24 may be configured as one, and only the light receiving device 25 may be configured as two light receiving devices that receive light generated from the light emitting device 24, respectively. Meanwhile, in some cases, two sensors each having a light emitting element and a light receiving element may be combined on the printed circuit board 23.

In other words, the portion in which the slit of the disc is formed passes between the light emitting element and the light receiving element of the sensor thus formed, from which the sensor senses the rotational direction of the disc.

An operation of the sensing unit 11 will be described with reference to FIGS. 3 (a) and 3 (b).

As described above, a plurality of slits are formed at regular intervals at the edge of the disc, and the two light receiving elements of the sensor detect the light received due to the passage of the disc, where which light receiving element received the light first. The direction of rotation of the disc is thus determined. That is, after setting any one light receiving element to be slightly larger than the gap between the two slit of the two light receiving element is turned on, the other light receiving element is turned on, both of the light passing through the on interval, the first light receiving element is turned off Turn off the remaining light-receiving element.

This will be described in more detail with reference to FIG. 3 (b). In FIG. 3 (b), for convenience of explanation, the edges of the slit-formed discs are represented in a straight line, and the two light receiving elements of the sensor are moved along the straight discs.

The two light receiving elements move from the position 1 to the position 2 (the disk is actually rotated clockwise), and the right light receiving element is turned on first, in which case the direction of rotation is detected. The rotation calculation unit 12 outputs a positive pulse until the left light receiving element is turned on, that is, the moment when both light receiving elements are turned on, and the moment when the right light receiving element is turned off (3-5). Indicates that one slit has moved clockwise. When both light receiving elements are turned off (six sections), the rotation direction detected in the clockwise direction is reset.

If two light-receiving elements move from the position 7 to the position 8 and then rotate in the reverse direction to the position 9 again, the direction of rotation detected in the clockwise direction is reset, and the direction of rotation continues counterclockwise at the position 10. Direction is detected, and a negative pulse is generated during the 11 to 13 sections.

FIG. 5 is a detailed circuit diagram of the rotation calculation unit 12 that calculates the rotation direction by using the signal sensed by the sensor.

The rotation direction value calculating circuit 51 includes an exclusive logic sum gate 511 which notifies when only one of the first sensor and the second sensor is in an on state, an output of the first sensor, and an output of the exclusive logic sum gate 511. A state in which the second sensor is turned on by receiving a first logical gate 512 for checking whether the first sensor is turned on and an output of the second sensor and an output of the exclusive logic sum gate 511. The output of the second logical gate 513 is subtracted from the output of the second logical gate 513 and the output of the first logical gate 512 to confirm whether the rotation direction is positive (+) or negative ( And a subtractor 514 represented by the signal.

The rotation direction value holding circuit 52 logically combines an output of the first logical sum gate 521 and the output of the subtractor 514 and the previous subtractor fed back to sense the moment when both the first sensor and the second sensor are turned off. The output of the previous subtractor until the first logic gate 522 and the output of the first logic gate 521 and the output of the second logic gate 522 are turned off until both of the first and second sensors are turned off. And a third logical gate 523 to maintain.

The wind direction value output circuit 53 includes a fourth logical gate 531 for detecting a state in which both the first and second sensors are turned on, and an output of the fourth logical gate 531 and the third logical gate ( And a multiplier 532 for multiplying the output of 523 to output a wind direction value.

The operation of the rotation calculation unit 12 having such a configuration will be described with reference to FIGS. 6 (a) to 6 (c).

First, the operation of the rotation direction value calculating circuit 51 generating a signal indicating the rotation direction using the signals sensed by the two sensors will be described.

For example, assuming that the signals output from the first sensor and the second sensor are the same as S1 and S2 shown in FIG. 6 (a), respectively, the exclusive logical sum gate 511 is represented by B of FIG. 6 (a). Output the same signal. That is, the exclusive logical sum gate 511 receives the outputs S1 and S2 of the first and second sensors in order to calculate the rotational direction of the original plate, and outputs a paddy "low" value when the two signal values are the same. When the two signal values are different from each other, a logic “high” value is output. As described above, the exclusive logic sum gate 511 senses when only one of the two sensors is turned on and outputs a logic “high” value.

As such, when one of the two sensors is sensed to be turned on, first and second logical gates 512 and 513 and a subtractor 514 are provided to determine which sensor is turned on first.

The first logical multiplication gate 512 receives the output S1 of the first sensor and the output B of the exclusive OR gate 511 and outputs a signal such as C by performing a logical multiplication. That is, the first logical product gate 512 outputs a logic "high" value when the first sensor is turned on first, and outputs a logic "low" value.

The second logical product gate 513 receives the output S2 of the second sensor and the output B of the exclusive OR gate 511 and outputs a signal such as D by performing an AND operation. That is, the second logical gate 512 outputs a logic "high" value when the second sensor is turned on first, and outputs a logic "low" value.

The subtractor 514 subtracts the output D of the second logical gate 513 from the output C of the first logical gate 512 to output the signal E of FIG. 6 (b). That is, the subtractor 514 outputs a positive value when the first sensor is turned on first, and outputs a negative value when the second sensor is turned on first.

In this way, the subtractor 514 indicates which sensor is turned on first by a positive or negative signal. In the embodiment of the present invention, a positive signal indicates a clockwise direction, and a negative signal indicates a counterclockwise direction.

Next, the operation of the rotation direction value holding circuit 52 which maintains the output of the subtractor 514 until the moment when both sensors are turned off will be described.

The first logic gate 521 detects the moment when both the first and second sensors are turned off. The first logic gate 521 is configured to logically combine the output S1 of the first sensor and the output S2 of the second sensor. Outputs a signal such as G in FIG. The second logical sum gate 522 logically sums the feedback signal of the third logical gate 523 and the output of the subtractor 514 and outputs a signal such as F of FIG. 6 (b). The third logical gate 523 logically multiplies the output G of the first logical sum gate 521 by the output F of the second logical sum gate 522 and outputs a signal such as H. The third logical product The output H of the gate 523 is fed back to the multiplier 532 and the second logic gate 522.

The reason for feeding back the output H of the third logical gate 523 is to maintain the detected rotational direction signal until it is reset. That is, after both sensors are turned on, the first sensor is turned on later. First off, in this case, only one sensor generates a signal, it is recognized that the rotation direction is changed. Therefore, the rotation direction value holding circuit 52 prevents the rotation direction value from changing before both sensors are turned off and reset.

The fourth logical product gate 531 of the wind direction value output circuit 53 outputs a logic "high" value as shown in A of FIG. 6 (a) when two sensors are turned on at the same time. The multiplier 532 multiplies the output of the fourth logical multiplication gate 531 by the output of the third logical multiplication gate 523 and outputs a signal such as I shown in FIG. 6 (b). That is, the output I of the multiplier 532 represents the rotation direction and the wind direction value of the disc as an electric signal.

The rotation direction signal I of the disc thus output is accumulated by the accumulator 54 (signal like J in FIG. 6 (c)) and input to the analog / digital converter (13 in FIG. 1).

K in FIG. 6 (c) represents a signal sampled after passing through the analog-to-digital converter (13 in FIG. 1).

In the present invention as described above, if the interval between the slits is set smaller, the error of the angle can be reduced.

The present invention as described above can be obtained accurately and easily in a short time the direction and direction of the wind direction (wind rotation speed) in the wind environment test of the building, while reducing the time consumption effect that can be usefully reflected in the design of building fire There is.

Claims (7)

Sensing means including at least two sensors to detect a rotation state of the rotating body rotated by wind; Rotation calculation means for calculating a rotation direction and rotation angle (rotation speed) of the rotating body using the signal sensed by the sensing means, and accumulating the calculated value; Analog / digital conversion means for converting an analog signal, which is an output of the rotation calculation means, into a digital signal; And measurement computing means for calculating a wind direction and a wind direction angle using a signal input from the analog / digital converting means, wherein the rotation calculating means measures the rotation direction of the disc from the signal sensed by the sensing means. A rotation direction value calculating means for outputting a +) / negative signal and a rotation for maintaining the current rotation direction value until both of the at least two sensors are turned off by feeding back the output of the rotation direction value calculating means. Wind direction value output means for outputting the rotation direction and the rotation value input from the rotation direction value holding means corresponding to the direction value holding means, the state section where both the sensors are turned on, and the signal output from the wind direction value output means Wind direction measuring apparatus comprising a cumulative means for accumulating. The disk according to claim 1, wherein the sensing means is coupled to a rotating shaft of the rotating body and interlocks with the rotating body, and includes a plurality of slits formed at predetermined intervals around a circular edge, and the disk is rotated according to the rotation of the disk. At least two sensors for detecting the state of rotation by detecting the light transmitted through the slit of the disc, characterized in that the wind direction measuring apparatus. The wind direction measuring apparatus of claim 2, wherein the two sensors include at least one light emitting element and at least two light receiving elements. The method of claim 3, wherein the two light receiving elements are set larger than the interval between the two slits formed in the disc, the any one of the light receiving element is turned on, then any other light receiving element is turned on, first turned on And the predetermined light receiving element is turned off and then the other light receiving element is turned off. The apparatus of claim 1, wherein the rotation direction value calculating means comprises: exclusive OR means for detecting a state in which only one of the first sensor and the second sensor is turned on, and an output of the first sensor and an output of the exclusive OR value; First logical means for receiving and checking whether the first sensor is in an on state; Second logical multiplication means for receiving an output of the second sensor and an output of the exclusive OR means and checking whether the second sensor is in an on state; And a subtracting means for subtracting the output of the second logical multiplying unit from the sorting of the first logical multiplying unit to indicate a rotation direction as a positive (+) or negative (-) signal. 6. The apparatus of claim 5, wherein the rotation direction value holding means comprises: first logical summation means for sensing a moment at which both the first sensor and the second sensor are turned off; Second logical sum means for ORing the output of the subtraction means and the output of the previous subtraction means fed back; And third logical multiplication means for receiving the output of the first logical sum means and the output of the second logical sum means and maintaining the output of the previous subtracting means until both the first and second sensors are turned off. Wind direction measuring device characterized in that. 7. The apparatus of claim 6, wherein the wind direction value output means comprises: fourth logical product means for detecting a state in which both the first and second sensors are turned on; And multiplication means for multiplying the output of the fourth logical product by the output of the third logical product and outputting a rotation direction and a rotation value.

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