JPH0777583A - Weather forecasting method - Google Patents

Abstract

PURPOSE:To make quick weather forecast possible by comparing a detected atmospheric pressure with a maximum atmospheric pressure when 'fine weather' is indicated whereas comparing with a lowest atmospheric pressure when 'rainy weather' is indicated. CONSTITUTION:When 'fine weather' is presented on an indicator 4 based on an output data from an atmospheric pressure sensor 1, an atmospheric pressure data stored in a RAM of a control circuit 3 is rewritten by an output data from the sensor 1 as a reference data. Upon the elapse of 10min, an output from the sensor 1 is compared with the reference data and when the pressure drop is in the range of 3 to 5hPa, a pressure drop is indicated 4. When the atmospheric pressure drops 5hPa or more, the circuit 3 makes such a decision that rain falls 8 hours later and 'rain' is indicated 4. When the atmospheric pressure drop is lower than 3hPa, 'fine' is indicated continuously and if the reference data is exceeded, current output data from the sensor 1 is rewritten by the reference data. Since comparison is made with a highest pressure for 'fine weather' and with a lowest pressure for 'rainy weather', ascending/ descending trend of atmospheric pressure can be detected quickly.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a weather forecasting method.

[0002]

2. Description of the Related Art Conventionally, as a device for predicting weather such as after 8 hours, a chamber that expands and contracts in response to changes in atmospheric pressure is used, and a contact piece that displaces in accordance with the expansion and contraction state of the chamber is used. An electrode is provided at each end of the displacement range of the contact piece, and when the contact piece touches one electrode when it is sunny and the other electrode contacts when it is raining, an atmospheric pressure sensor is used to detect atmospheric pressure. There is something I had.

In this weather forecasting device, when the contact piece is in contact with one of the electrodes, the weather is predicted, when it is in contact with the other electrode, rain is predicted, and the contact piece is connected to the one electrode. When it was separated, the weather was forecasted to fall, and when it was separated from the other electrode, the weather was forecasted to rise.

[0004]

However, in the case where the contact piece is moving so as to vibrate in a range where it does not come into contact with any of the electrodes, the moving direction of the contact piece cannot be detected, and the above-mentioned is not accurate. However, there is a problem that it is not possible to notify the tendency of the change of the weather.

Further, since the barometric pressure sensor is a mechanical type, there has been a great limitation in downsizing the structure.

It is an object of the present invention to provide accurate weather forecasts based on barometric pressure.

[0007]

According to the present invention, atmospheric pressure information is detected by an atmospheric pressure sensor at predetermined time intervals, and based on the amount of change in the detected atmospheric pressure information, the weather tendency after a desired time or future weather fluctuation tendency is determined. In the weather forecasting method of predicting and displaying the weather forecast, when the trend tendency of the weather is displayed,
When the change amount of the atmospheric pressure information detected by the atmospheric pressure sensor and the atmospheric pressure information stored in the storage means is within the desired range and the direction of the change corresponds to the above-mentioned variation tendency, it is currently performed. Continue displaying the weather trend,
When the amount of change is out of the desired range, the display is changed to the weather information and the stored information in the storage means is updated to the atmospheric pressure information detected this time, and the atmospheric pressure is displayed when the weather is fine or rainy. Barometric pressure information detected by the sensor,
First compared with atmospheric pressure information stored in the storage means
When the amount of change is greater than or equal to the set value of 2 and less than the second set value, the display is switched to the display of the tendency of change in the weather according to this change amount, and when the amount of change is greater than or equal to the second set value, other weather is displayed. When the amount of change is less than the first set value, the current weather display is continued, and when fine weather is displayed, the detected atmospheric pressure information is stored in the storage means. If it is higher than the atmospheric pressure information being stored, the stored information in the storage means is updated to the atmospheric pressure information detected this time, and when rain is displayed, the detected atmospheric pressure information is the atmospheric pressure stored in the storage means. When it is lower than the information, the above-mentioned object is achieved by updating the stored information of the storage means to the atmospheric pressure information detected this time.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be specifically described below based on an embodiment shown in the drawings.

In FIG. 1a, reference numeral 1 is a semiconductor atmospheric pressure sensor for detecting atmospheric pressure. 2 is an A / D converter. Three
Is a control circuit, which is composed of CPU, ROM, RAM, etc.
Controls various operations. Reference numeral 4 is a display device, which can display four types of weather such as “fine” and “rain” as a weather forecast after 8 hours and “up” and “fall” as future weather fluctuation trends. Any one of them is selectively displayed according to.

Next, the operation will be described. In this example, 1
The output of the atmospheric pressure sensor 1 is read every 0 minutes.

First, the initial read operation will be described with reference to FIG. 1b.

When the power is turned on, the control circuit 3 reads the output of the atmospheric pressure sensor 1 and stores the output data in the RAM in the control circuit 3 as the initial atmospheric pressure.

When the initial atmospheric pressure is 1013 hPa or more (step 1a), the atmospheric pressure sensor 1 read after 10 minutes has elapsed
If the output of is lower than the initial atmospheric pressure by 3.5 hPa or more (step 1b), the control circuit 3 judges that the weather after 8 hours will be "rain" and causes the display device 4 to display "rain". (Step 1c) If the pressure is higher than the initial atmospheric pressure by 2.5 hPa or more (Step 1b), it is determined that the weather after 8 hours will be "fine", and the display device 4 is caused to display "fine" (Step 1d). . If the output of the barometric pressure sensor 1 after 10 minutes is not included in the above range, 1
The output of the atmospheric pressure sensor 1 read every 0 minutes is compared, and this operation is repeated until this output falls within the above range (step 1b).

When the initial atmospheric pressure is less than 1013 hPa (step 1a), if the output of the atmospheric pressure sensor 1 read after 10 minutes is lower than the initial atmospheric pressure by 2.5 hPa or more (step 1e), "rain" occurs after 8 hours. When it is determined that "rain" is displayed on the display device 4 (step 1f) and the pressure is higher than the initial atmospheric pressure by 3.5 hPa or more (step 1f).
e), 8 hours later, it is judged as “fine” and the display device 4 displays “fine”.
Is displayed (step 1g). When the detection range of the atmospheric pressure sensor 1 is not included in this range, this operation is repeated in the same manner as above (step 1e).

Next, the weather forecasting operation when "fine" is displayed will be described in detail with reference to FIG. 2a.

When the display device 4 displays "fine" from the read output data of the atmospheric pressure sensor 1, the control circuit 3 rewrites the atmospheric pressure data stored in the RAM therein to the output data of the atmospheric pressure sensor 1 at this time. (Step a1). This rewritten data is used as reference data.

Then, the output of the barometric pressure sensor 1 after 10 minutes is compared with the reference data, and when the output data of the barometric pressure sensor 1 is included in the falling range of 3 hPa or more and less than 5 hPa from the reference data (step a2). The weather will “fall” in the future
Then, it is judged that the display device 4 displays "descent" (step a3).

When the output data of the atmospheric pressure sensor 1 is lower than the reference data by 5 hPa or more (step a2), the control circuit 3 judges "rain" after 8 hours, and displays "rain" on the display device 4. (Step a4).

When the output data of the atmospheric pressure sensor 1 is out of the above range, the display of "fine" is continued and the output data is higher than the reference data (step a5).
Returning to step a1, the reference data stored in the RAM in the control circuit 3 is rewritten to the output data of the current atmospheric pressure sensor 1. That is, the maximum atmospheric pressure value when “fine” is displayed is stored in the RAM in the control circuit 3.

As described above, when "fine" is displayed, the maximum atmospheric pressure is compared with the output data of the atmospheric pressure sensor 1 instead of the previous output data, so that the downward pressure tendency of the atmospheric pressure can be detected quickly. That is, future weather trends can be immediately notified from changes in atmospheric pressure.

Next, the weather forecasting operation when "rain" is displayed will be specifically described with reference to FIG. 2b.

When the display device 4 displays "rain" from the read output data of the atmospheric pressure sensor 1, the control circuit 3 rewrites the atmospheric pressure data stored in the RAM therein to the output data of the atmospheric pressure sensor 1 at this time. The rewritten data is used as reference data (step b1).

Then, the output of the barometric pressure sensor 1 after 10 minutes is compared with the reference data, and when the output data of the barometric pressure sensor 1 is within the range of increase of 3 hPa or more and less than 5 hPa from the reference data (step b2), The weather will rise in the future
Then, it is judged that the display device 4 displays "rising" (step b3).

When the output data of the atmospheric pressure sensor 1 is higher than the reference data by 5 hPa or more (step b2), the control circuit 3 judges that it is "fine" after 8 hours, and displays "fine" on the display device 4. (Step b4).

When the output data of the atmospheric pressure sensor 1 is out of the above range (step b2), the display of "rain" is continued, and when the output data is lower than the reference data (step b5), the process goes to step b1. Returning, the reference data stored in the RAM in the control circuit 3 is rewritten to the output data of the atmospheric pressure sensor 1 this time. That is, the minimum atmospheric pressure value when "rain" is displayed is stored in the RAM in the control circuit 3.

As described above, when "rain" is displayed, the lowest atmospheric pressure is compared with the output data of the atmospheric pressure sensor 1 instead of the previous output data, so that the rising tendency of the atmospheric pressure can be detected quickly. That is, future weather trends can be immediately notified from changes in atmospheric pressure.

Next, the weather forecasting operation when "up" is displayed will be specifically described with reference to FIG. 2c.

When the display device 4 displays "increase" from the read output data of the barometric pressure sensor 1, the control circuit 3 stores the barometric pressure data stored in the RAM therein, as in the above. The output data is rewritten, and the rewritten data is used as reference data (step c1).

Then, similarly to the above, the output of the barometric pressure sensor 1 after 10 minutes is compared with the reference data, and 5 is obtained from the reference data.
If it is higher than hPa (step c2), the control circuit 3 judges that it will be "fine" after 8 hours, and displays "fine" on the display device 4 (step c3), and if it is descending (step c3). c2) It is determined that it will be "rainy" after 8 hours, and "rainy" is displayed on the display device 4 (step c4).

The output data of the atmospheric pressure sensor 1 is 0 to 5 hPa.
If the change is less than the rise, the display of "rise" is continued without changing the reference value (step c2).

Next, the weather forecasting operation when "Descent" is displayed will be described in detail with reference to FIG. 2d.

When the display device 4 displays "descent" from the read output data of the barometric pressure sensor 1, the control circuit 3 stores the barometric pressure data stored in the RAM therein as in the case of the barometric pressure sensor 1 at this time. The output data is rewritten, and the rewritten data is used as reference data (step d1).

Then, in the same manner as above, the output of the atmospheric pressure sensor 1 after 10 minutes is compared with the reference data, and 5 is obtained from the reference data.
If it is lower than hPa (step d2), the control circuit 3 judges that it will be "rainy" after 8 hours, displays "rainy" on the display device 4 (step d3), and is rising (step d3). d2) It is determined that the weather will be "clear" after 8 hours, and "clear" is displayed on the display device 4 (step d4).

The output data of the atmospheric pressure sensor 1 is 0 to 5 hPa.
In the case of the downward fluctuation of less than, the display of "descent" is continued without changing the reference data (step d2).

Next, the results of comparison between the weather forecast predicted as described above and the actual weather will be shown. It should be noted that "up" and "down" in this example are "cloudy", and the initial reading operation when the power is turned on is not applied. In addition, when the weather was forecasted to be “clear” in this example, it was determined that the weather was “clear” or “cloudy” after 8 hours, and it was judged to be correct, and “cloudy” (in this example, “up” and “down”). )), The weather after 8 hours was “clear” or “cloudy”, it was judged to be correct, and when forecasting “rain”, the weather after 8 hours was “cloudy” or “cloudy”. In case of "rain", it will be judged as hit.

In this case, the hit rate from 1 to 3 months is 77.
5%, 84.5% in April-June, 72.8% in July-September, 77.2% in October-December. Therefore, it can be seen that the weather forecast is executed with high probability.

In the above embodiment, in FIGS.
Atmospheric pressure difference as a reference for display change (3hPa, 5hPa)
However, Fig. 3 shows the hit rate when this is changed and compared with the actual weather.

From the figure, it is clear that the barometric pressure difference as a standard for display change is (3 hPa, 5 hPa), but the hit rate is the highest, but the standard for display change is according to the climate of the region where the present invention is implemented. The atmospheric pressure difference may be changed.

[0039]

According to the present invention, the weather forecast can be made more accurately than the conventional one. In other words, the maximum atmospheric pressure and the detected atmospheric pressure are compared when the weather is displayed, and the minimum atmospheric pressure and the detected atmospheric pressure are compared when the rain is displayed, making it easy to detect changes in atmospheric pressure and providing a quick weather forecast. I can do it. Also, when the weather fluctuation tendency is displayed, the stored atmospheric pressure information is compared with the detected atmospheric pressure without being changed, so switching from the weather fluctuation tendency display to the weather display can be performed quickly and accurately. I can do it.

[Brief description of drawings]

FIG. 1 is a block circuit diagram for executing a method according to an embodiment of the present invention and a flowchart for explaining the operation thereof.

FIG. 2 is a flowchart for explaining the operation of FIG.

FIG. 3 is an explanatory diagram showing a hit rate of a weather forecast according to an embodiment of the present invention.

[Explanation of symbols]

 1 Barometric pressure sensor

Claims (1)

[Claims] 1. Atmospheric pressure information is detected by an atmospheric pressure sensor at predetermined time intervals, and based on the amount of change in the detected atmospheric pressure information, the weather after a desired time or the trend of future weather fluctuations is predicted, and the weather forecast is displayed. In the weather forecasting method to be performed, when the tendency of change in the weather is displayed, the change amount between the pressure information detected by the pressure sensor and the pressure information stored in the storage means is within a desired range. When the direction of the change corresponds to the above-mentioned change tendency, the display of the current change tendency of the weather is continued, and when the change amount is out of the desired range, the display is switched to the weather and the above-mentioned memory is stored. The memory information of the means is updated to the atmospheric pressure information detected this time, and the atmospheric pressure information detected by the atmospheric pressure sensor is displayed as the atmospheric pressure information stored in the storage means while displaying the weather of fine weather or rain. In comparison, when the amount of change is equal to or more than the first set value and less than the second set value, the display is switched to the display of the trend tendency of the weather according to the amount of change, and when the amount of change is the second set value or more, When the display is switched to another weather display, and the amount of change is less than the first set value, the current weather display is continued, and when fine weather is displayed, the detected atmospheric pressure information is displayed. When the atmospheric pressure information stored in the storage means rises, the stored information in the storage means is updated to the atmospheric pressure information detected this time, and when rain is displayed, the detected atmospheric pressure information is stored in the storage means. A weather forecasting method characterized in that, when the atmospheric pressure information is lower than the stored atmospheric pressure information, the stored information in the storage means is updated to the atmospheric pressure information detected this time.