JP2779376B2 - Weather forecast method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

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

[0002]

2. Description of the Related Art Conventionally, as a device for predicting the weather eight hours later or the like, a chamber that expands and contracts in accordance with a change in atmospheric pressure has a contact piece that is displaced in accordance with the expansion and contraction state of the chamber. Electrodes are provided at both ends of the displacement range of the contact piece, and a pressure sensor is used to detect the atmospheric pressure by contacting the contact piece with one electrode when it is sunny and by contacting the other electrode when it is raining. There was something.

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

[0004]

However, the above-mentioned device cannot detect the moving direction of the contact piece when the contact piece moves so as to vibrate in a range where the contact piece does not come into contact with any electrode. There was a problem that it was not possible to notify the tendency of the fluctuation of the weather.

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

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

[0007]

SUMMARY OF THE INVENTION According to the present invention, pressure information is detected by a pressure sensor at predetermined time intervals, and based on the amount of change in the detected pressure information, weather fluctuation after a desired time or future weather fluctuation tendency is detected. In the weather forecasting method of forecasting and displaying the weather forecast, when displaying the fluctuation tendency of the weather,
This is performed when the amount of change between the atmospheric pressure information detected by the atmospheric pressure sensor and the atmospheric pressure information stored in the storage means is within a desired range, and the direction of the change corresponds to the above-mentioned fluctuation tendency. Continue to show weather trends,
When the change amount is outside the desired range, the display is switched to the display of the weather, and the storage information of the storage unit is updated to the pressure information detected this time. The barometric pressure information detected by the sensor is
The first information is compared with the atmospheric pressure information stored in the storage means.
When the amount of change is equal to or more than the set value and less than the second set value, the display is switched to the display of the weather fluctuation tendency corresponding to the amount of change, and when the amount of change is equal to or more than the second set value, the display of another weather is displayed. When the change amount is less than the first set value, the display of the current weather is continued, and when the fine is displayed, the detected atmospheric pressure information is stored in the storage means. If the pressure is higher than the detected atmospheric pressure information, the storage information in the storage means is updated to the pressure information detected this time, and when rain is displayed, the detected pressure information is stored in the storage means in the storage means. When the value falls below the information, the above-mentioned object is achieved by updating the information stored in 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 with reference to one embodiment shown in the drawings.

In FIG. 1A, reference numeral 1 denotes a semiconductor pressure sensor for detecting a pressure. Reference numeral 2 denotes an A / D converter. 3
Is a control circuit consisting of CPU, ROM, RAM, etc.
Controls various operations. Reference numeral 4 denotes a display device, which is capable of displaying four types of weather forecast 8 hours later: "clear" and "rain", and future trends in the weather such as "rise" and "fall". , One of them is selectively displayed.

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

First, an 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 pressure is 1013 hPa or more (step 1a), the pressure sensor 1
Is lower than the initial atmospheric pressure by 3.5 hPa or more (step 1b), the control circuit 3 determines that the weather after 8 hours will be "rain" and causes the display device 4 to display "rain". (Step 1c) If the air pressure has risen by 2.5 hPa or more from the initial pressure (Step 1b), it is determined that the weather eight hours later will be "fine", and the display device 4 will display "fine" (step 1d). . If the output of the atmospheric pressure sensor 1 after 10 minutes is not included in the above range, 1
This operation is compared with the output of the atmospheric pressure sensor 1 read every 0 minutes, and this operation is repeated until the output falls within the above range (step 1b).

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

Next, the weather forecast operation when "sunny" is displayed will be specifically described with reference to FIG. 2A.

When the display device 4 indicates "fine" from the read output data of the pressure sensor 1, the control circuit 3 rewrites the pressure data stored in the RAM therein to the output data of the pressure sensor 1 at this time. (Step a1). The 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. If the output data of the barometric pressure sensor 1 falls within a 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 determined that "down" is displayed on the display device 4 (step a3).

If 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).

If the output data of the atmospheric pressure sensor 1 is out of the above range, the display of "fine" is continued and if 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 current output data of the 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 pressure and the output data of the atmospheric pressure sensor 1 are compared with the output data of the atmospheric pressure sensor 1 instead of the previous output data, so that the downward tendency of the atmospheric pressure can be quickly detected. In other words, the weather tendency in the future can be immediately notified from the change in the atmospheric pressure.

Next, the weather forecast 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 into the output data of the atmospheric pressure sensor 1 at this time. The rewritten data is used as reference data (step b1).

The output of the barometric pressure sensor 1 after 10 minutes is compared with the reference data. If the output data of the barometric pressure sensor 1 falls within a range 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 determined that "up" is displayed on the display device 4 (step b3).

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

If the output data of the atmospheric pressure sensor 1 is out of the above range (step b2), the display of "rain" is continued, and if the output data is lower than the reference data (step b5), the process proceeds 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 at 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 minimum pressure and the output data of the pressure sensor 1 are compared with the output data of the pressure sensor 1 instead of the previous output data. In other words, the weather tendency in the future can be immediately notified from the change in the atmospheric pressure.

Next, the weather forecast operation when "rise" is displayed will be described in detail with reference to FIG. 2C.

When the display device 4 indicates "rise" from the read output data of the atmospheric pressure sensor 1, the control circuit 3 stores the atmospheric pressure data stored in the RAM therein in the same manner as described 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 pressure sensor 1 after 10 minutes is compared with the reference data.
If it has increased by hPa or more (step c2), the control circuit 3 determines that it will be “clear” after 8 hours, displays “clear” on the display device 4 (step c3), and if it has decreased (step c3). c2) It is determined that "rain" will occur after 8 hours, and "rain" is displayed on the display device 4 (step c4).

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

Next, the weather forecast operation when "Descent" is displayed will be specifically described with reference to FIG. 2D.

When the display device 4 displays "Descent" from the read output data of the atmospheric pressure sensor 1, the control circuit 3 stores the atmospheric pressure data stored in the RAM therein in the same manner as described above. The output data is rewritten, and the rewritten data is used as reference data (step d1).

Then, the output of the pressure sensor 1 after 10 minutes is compared with the reference data, and 5
If the pressure falls by hPa or more (step d2), the control circuit 3 determines that it will be “rain” after 8 hours, displays “rain” on the display device 4 (step d3), and raises it (step d3). d2) It is determined that “sunny” will be obtained after eight hours, and “sunny” is displayed on the display device 4 (step d4).

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

Next, a comparison result between the weather forecast predicted as described above and the actual weather is shown. In this example, “up” and “down” are “cloudy”, and the initial reading operation at power-on is not applied. In addition, when "sunny" is predicted in the present embodiment, it is determined that the weather eight hours later is "fine" or "cloudy", and it is determined that a hit has occurred, and "cloudy" (in this example, "up" and "down"). )), When the weather 8 hours later is “fine” or “cloudy”, it is judged to be correct, and when “rain” is forecast, the weather 8 hours later is “cloudy” or “cloudy”. In the case of "rain", it will be judged that it hit.

In this case, the hit ratio between January and March is 77.
5%, hit rate between April and June is 84.5%, hit rate from July to September is 72.8%, hit rate from October to December is 77.2% It can be seen that the weather forecast is executed with a high probability.

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

It is apparent from the figure that the pressure difference, which is the reference for changing the display, is the highest when the pressure difference is (3 hPa, 5 hPa). However, the reference for changing the display depends on the climate of the region where the present invention is implemented. May be changed.

[0039]

According to the present invention, a more accurate weather forecast can be made as compared with the conventional one. In other words, when displaying the fine weather, the maximum pressure and the detected pressure are compared, and when displaying the rain, the minimum pressure and the detected pressure are compared. I can do it. Also, when the weather fluctuation trend is displayed, the stored atmospheric pressure information is compared with the detected atmospheric pressure without being changed, so that the switching from the weather fluctuation trend display to the weather display is quickly and accurately performed. I can do it.

[Brief description of the 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. 1;

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

[Explanation of symbols]

 1 Atmospheric pressure sensor

Claims (1)

(57) [Claims] 1. Atmospheric pressure information is detected by a pressure sensor at predetermined time intervals, and a weather tendency after a desired time or a future weather change tendency is predicted based on a change amount of the detected pressure information, and a weather forecast is displayed. In the weather prediction method to be performed, when the tendency of the weather fluctuation is displayed, the change amount between the pressure information detected by the pressure sensor and the pressure information stored in the storage means is a change amount within a desired range. When the direction of the change corresponds to the change tendency, the display of the current change tendency of the weather is continued, and when the change amount is outside the desired range, the display is switched to the weather display and the storage is performed. The storage information of the means is updated to the pressure information detected this time, and when displaying fine or rainy weather, the pressure information detected by the pressure sensor is compared with the pressure information stored in the storage means. If the change amount is greater than or equal to the first set value and less than the second set value, the display is switched to the display of the weather fluctuation tendency according to the change amount, and if the change amount is equal to or greater than the second set value, The display is switched to another weather display. If the change amount is less than the first set value, the display of the current weather is continued. When the pressure rises from the pressure information stored in the storage means, the storage information in the storage means is updated to the pressure information detected this time, and when rain is displayed, the detected pressure information is stored in the storage means. A weather prediction method characterized by updating the storage information of the storage means with the pressure information detected this time when the pressure falls below the stored pressure information.