JPS5838733B2 - electronic rain gauge - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an electronic barometer that mechanically and electrically analyzes the direction and amount of changes in atmospheric pressure measured by a barometer based on meteorological judgment, and displays the results as a weather trend forecast.

In most cases, a drop in atmospheric pressure is due to a low pressure system passing by and is a sign of bad weather, while a rise in atmospheric pressure is a sign of a high pressure system passing by and a sign of good weather. It is.

For this reason, barometers have been used for a long time to observe changes in atmospheric pressure and predict weather trends, so barometers have also been called barremeters.

However, the aneroid barometer that has traditionally been used in households originally indicates the equivalent of atmospheric pressure, so it is necessary to learn weather trends through long observation records, or by placing a counter needle over the pointer. The system predicts weather trends by determining the direction and amount of atmospheric pressure change based on the angle at which the pointer moves several hours later, but it is difficult to operate, takes time, and cannot respond to rapidly changing weather conditions. Even if one can know atmospheric pressure changes, a certain amount of meteorological knowledge is required to predict the weather, so at present they are simply wall-mounted decorations.

On the other hand, although the nation's weather observation equipment and forecasting services have been enhanced and expanded year by year, the current situation is that wide-area forecasts cannot be avoided and the majority of people still seek local weather forecasts.

In addition, as a barometer that can be used to determine weather trends by looking at the barometer, as described in Japanese Patent Publication No. 50-39538, an aneroid barometer has a sector-shaped barometer that uses minute torque on the pointer shaft. There are devices that display weather trends through a small window by expanding the display board, but it is not possible to judge whether the weather is going uphill or downhill when the display board is in the middle of rotation, or there are mechanical limitations. It is inappropriate to visually communicate weather forecasts to large numbers of people by installing them on streets.

Furthermore, according to the one described in Japanese Patent Application No. 47-26754, it is large and complicated due to the incorporation of a motor, its gear group, and a mechanical switching mechanism, resulting in high cost. Therefore, contact failure due to contact resistance or corrosion is likely to occur, and breakdowns are likely to occur.Also, the display uses three display methods: ``The weather is getting better'', ``The weather is getting worse'', and ``The weather is changing'', and it does not have a memory circuit. There are many drawbacks, such as the inconvenience of being unable to distinguish between ``changes in the weather'' and whether the weather is changing for the better or the weather is changing for the worse.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a barometer equipped with a novel mechanism that electrically transmits the local weather forecast clearly at a glance using a display lamp or the like.

Another object of the present invention is to provide an electronic barometer with a simple structure, small size, less trouble, and an inexpensive atmospheric pressure change detection and display mechanism.

Hereinafter, the mechanism of the present invention will be explained in detail based on an embodiment shown in the drawings.

Fig. 1 is a front view of a normal aneroid type barometer incorporating the mechanism of the present invention.Since the structure of an aneroid type barometer is well known, it is necessary to refer to the guidelines 1 for explaining the present invention.
, the pointer shaft 2 and dial plate 3 are illustrated, and other mechanisms are omitted.

FIG. 2 is an enlarged view of the section S-8 in FIG. 1.

First, in FIGS. 1 and 2, a pointer 1 and a pointer shaft 2 are fixed to each other and rotate in response to changes in atmospheric pressure, and a scale on a dial 3 indicates the equivalent amount of atmospheric pressure that changes moment by moment.

The detection plate 4 is made of light metal, is perfectly balanced above and below the center of the pointer shaft, is fixed integrally with the loosening tube 8, loosely penetrates the pointer shaft 2, and is freely rotatable.

7 to 7' are locking devices for the loosening tube 8, which are press-fitted into the pointer shaft 2 and maintain a slight gap with the loosening tube 8 to allow the loosening tube 8 to rotate freely while inhibiting forward and backward movement. It is stuck in the state.

The control spring 9 is a weak helical pressing spring installed in the loosening tube 8 and adjusted so that a slight and constant frictional force is generated between the bottom surface of the loosening tube 8 and the top surface of the locking tool 7. be.

Therefore, the detection plate 4 follows the rotation of the pointer shaft 2 due to friction, but when a braking force is applied, the loosening tube 8, the stopper I, and the pointer shaft 2 slip and stop.

Furthermore, the detection plate 4 has a control window 5 opened at an appropriate position, and a stopper 6 fixed to the barium gauge support passes through it to limit the amount of rotation.

According to the present invention, the size comparison between the control window 5 and the stopper 6 will be described in detail later, but it is an important part in determining weather trend information based on changes in atmospheric pressure, and has been carefully examined from meteorological experience. It has to be.

Ink acters 11 and 12, which are set so as to sandwich the end face of the detection plate 4 in FIG. When the operation of the plate 4 is interrupted or passed, the phototransistor converts the signal into an electric signal, which is input to the electronic circuit shown in FIG.

This completes the explanation of the structure, and the operation of this mechanism that responds to changes in air pressure will be explained in detail with reference to the air pressure change graph in FIG.

Figure 3 shows the change in atmospheric pressure over time, and it is 1010O5 at 0 o'clock.
The atmospheric pressure, which had fallen to
The graph shows that the temperature rose to 1010O3 at 15:00, and after 5 hours passed without any change, it started to fall at 15:00 and then gradually rose.

In order to convert this pressure change into weather trend information,
Set the amount of pressure change that corresponds to the weather change: ``How much does the atmospheric pressure need to rise to reliably predict that the weather will get better?'' Conversely, ``How much does the air pressure decrease to reliably predict that the weather will get worse?''It's about doing.

Therefore, taking into account daily changes in atmospheric pressure, reliability of forecasts, and promptness of forecasts, and as a result of analytical experiments with reference to daily records of ground observation at meteorological observatories, the amount of change in atmospheric pressure corresponding to weather changes was set at 4 mb.

In FIG. 3, when the dropped atmospheric pressure starts to rise from 1005 mb, the pointer 1 rotates clockwise and the detection plate 4 also rotates in the same direction.

When the atmospheric pressure increases by 4 mb and reaches point A at 1009 mb, the right side of the control window 5 comes into contact with the stopper 6 to correct the rotation.

In other words, according to FIGS. 4 to
This means that the luminous flux of 12D is passed through 12D.

The signal current of 11D is closed, and the signal current flows from 12D, passes through the amplification and waveform shaping circuit shown in FIG. 6, reaches the logic circuit 13, is stored and judged, and reaches the switching circuit 16 to select the D terminal.

In the middle of the process, a blinking signal is generated by the blinking circuit 14 and the display unit 15
The electrolyte circuit of display L1 is opened and the lamp starts flashing to warn that the weather is getting better.

After that, the atmospheric pressure increases until 5 o'clock and reaches the 0 point, and the pointer 1 rapidly rotates clockwise and indicates lo15mb, but the detection plate 4 slips with the pointer shaft 2 and remains unchanged.
The light flux of E is blocked, the light flux of 12B is passed through, and the lamp of display L1 continues to blink until it passes the 10 o'clock pressure drop turning point C and reaches point 2.

At the same time as the atmospheric pressure starts to fall from point C, the pointer 1 begins to rotate counterclockwise, and the detection plate 4 follows, and at the two points that have fallen 2 mb, it moves to the position shown in Fig. 4-Y.
The light beams E and 12E pass together and reach 11D and 12D, respectively, and supply a signal current to the logic circuit 13.

At this time, the logic circuit 13 remembers that 11E was cut off until then, and selects the switching circuit terminal to display a warning on the display section 15 that "the atmospheric pressure has turned to the direction of bad weather." ~ Open the light circuit of L3 and blink the lamp, and close the circuit of Ll and turn off the light.

Furthermore, when the atmospheric pressure starts to fall and falls to a point 4 mb, the detection plate 4 rotates and its relative position with the incretor 11 changes as shown in FIGS. A signal current flows and is determined, and the G contact is selected by the switching 16 to open the circuit of the "weather is getting worse" display L4, and the lamp starts blinking, and at the same time, the lamp L3 turns off.

Although the pressure continues to fall until the atmospheric pressure reaches 15:00, the detection plate 4 does not rotate due to the contact between the left side of the control window 5 and the stopper 6 and slips on the pointer shaft 2, so the state shown in Figure 4-Z does not change and the lamp of display L4 does not change. The atmospheric pressure exceeds the point of 1010O2 and rises 2mb to 10
The blinking continues until the 10O4 point, and the relationship between the detection plate 4 and the incrector 11 returns to the state shown in FIG.
As a result of the memory determination, the light circuit of display L2, which indicates that the atmospheric pressure has changed to a direction of improving weather, is opened, the lamp starts blinking, and display L4 is turned off.

Moreover, when the atmospheric pressure continues to rise and reaches 1006 mb, the position shown in FIGS.

In addition, the atmospheric pressure does not rise from the point 1010O5, but instead begins to decline as shown in the dotted line graph, and when it drops to the point io03mb, the detection mode in Figure 4 returns from Y to Z, and the L4 lamp begins blinking and the L2 The lamp goes out.

In this way, it continues to faithfully transmit information that corresponds to changes in atmospheric pressure, or in other words, changes in weather trends.

Note that the same display continues up to 2 mb even after passing the atmospheric pressure turning point due to diurnal changes in atmospheric pressure (regular changes in atmospheric pressure of 2.5 mb or less that occur every day throughout the four seasons, unrelated to the weather) or temporary atmospheric pressure due to heavy rain. This is to ignore the element of false alarms caused by the high density of traffic.

As detailed above, according to the electronic rain gauge of the present invention,
In addition to indicating the ever-changing atmospheric pressure values using an aneroid type barometer, the new mechanism provides weather trend forecasts that the general public is truly looking for, which are easy to understand, have a high accuracy rate, are inexpensive, and are less likely to malfunction. It is now possible to provide everything from small household lights to large-scale outdoor electric display lights.

[Brief explanation of the drawing]

Fig. 1 is a front view of an aneroid type barometer incorporating the mechanism of the present invention, Fig. 2 is an enlarged cross-sectional view at S-8 in Fig. 1,
Figure 3 is a graph showing changes in atmospheric pressure over time, Figure 4 is a diagram classifying the detection mechanism that responds to atmospheric pressure changes into three patterns, Figure 5 is a reference diagram of the power supply circuit, and Figure 6 is detection and amplification. , waveform shaping, memory, judgment, switching, and display circuit diagrams. 1... Pointer, 2... Pointer axis, 3...
...Dial board, 4...Detection plate, 5...
...Control window, 6...Stopper I...
・・Narrow stopper, 8 ・・・Loosening tube, 9 ・・・Control spring, 11-12 ・・・・Include button, IIE
~12E...Light emitting diode, IID~12D
...Phototransistor, 13...Logic circuit, 14...Blinking circuit, 15...
Display circuit, 16...Switching circuit.

Claims (1)

[Scope of Claims] 1. A barometer that indicates the absolute value of atmospheric pressure by means of a pointer that rotates and scans on a scale plate; a rotating detection plate; a pair of stoppers for controlling the horizontal rotation angle of the detection plate to a constant; There are two sets of incretors placed opposite each other in opposite positions, which output electrical signals when they come into contact and when they separate, and four display lamps L1. L2. L3. An electronic rain gauge characterized by comprising a switching circuit that selectively turns on L4.