JPS5930448Y2 - Electric display rain gauge - Google Patents

Description

[Detailed description of the invention] This invention is capable of predicting changes in weather related to the tendency or direction of atmospheric pressure fluctuations by using an electrical display for barometric pressure measurement equipment. This invention relates to an electric display type rain gauge incorporating a display mechanism.

A barometer is an instrument for measuring atmospheric pressure, which allows us to know whether atmospheric pressure is trending upward or downward.

When atmospheric pressure is rising, it is a sign that the weather is getting better, and when it is falling, it is a sign that the weather is getting worse.

Therefore, by knowing the trend of changes in atmospheric pressure using a barometer, it is possible to predict the weather to a certain extent, and in this sense, the barometer is also called a barometer.

By the way, in order to use a barometer as a simple weather gauge, it is not enough for the barometer to simply indicate the momentary rise and fall of atmospheric pressure; it is also able to tell whether the atmospheric pressure is rising or falling. In other words, it must be possible to indicate the ``trend'' or ``direction'' of changes in atmospheric pressure.

As a device for this purpose, a barometer has conventionally been constructed in which an aneroid barometer incorporates a display mechanism capable of indicating the tendency of changes in atmospheric pressure.

However, this display mechanism is mechanical, and the display plate of the display mechanism is mechanically driven using the deflection (rotational movement) of the barometer pointer.

In other words, the rotational movement of the barometer pointer is used directly as the driving force for the display board.

However, since the rotational force of the pointer in an aneroid barometer is extremely limited, the thickness of the display plate that can be driven by this rotational force is also limited.

If the display mechanism is built directly into the aneroid barometer, even a display board of limited size can sufficiently serve the purpose of display, but if a large-scale display system is used, Conventional purely mechanical display mechanisms are useless.

By installing barremeters at intersections, on the street, or in places where large numbers of people gather or pass by, such as bank stores and train station waiting rooms, we attempt to visually communicate a type of weather forecast to these large numbers of people. Then, it is necessary to adopt a large-scale display method.

The most common method is the electronic display method, and if the trend of changes in atmospheric pressure can be electrically displayed using the rotational movement of the pointer of an aneroid barometer, it will be possible to communicate weather forecasts to a large number of people at once, which is extremely useful. It's convenient.

It would be even more convenient if the barometric pressure values could be indicated from time to time using a large pointer.Therefore, the purpose of this invention was to tell the barometer the predicted weather conditions in relation to the direction of atmospheric pressure fluctuations. An object of the present invention is to provide an electric display type rain gauge incorporating an electric display mechanism for electrical display.

This invention is distantly related to the above-mentioned purpose, and specifically includes a barometer equipped with a pointer that swings left and right depending on the level of atmospheric pressure, and a pointer at one end that detects the movement of the pointer of the barometer. a rotating shaft having a detection section and a barometric pressure display main pointer at the other end that displays atmospheric pressure in an analog manner; a motor, an air pressure fluctuation trend detection unit that detects a tendency of air pressure fluctuation in proportion to the air pressure fluctuation, and a rain or shine display that displays the air pressure trend as a sunny or rainy trend in response to the output of the air pressure fluctuation trend detection unit. and the atmospheric pressure fluctuation tendency detection unit,
a rod contact mounted to extend parallel to the axial direction of the rotation shaft so as to rotate together with the rotation shaft, and a hole for passing the rod contact through, each of which is insulated from each other. A pair of conductive plates assembled so that the holes are offset in the circumferential direction and relatively rotatably mounted on the rotating shaft, and a brush electrode elastically contacting the outer peripheral surface of each of the conductive plates. , the distance from when the bar contact leaves one conductive plate contact to when it comes into contact with the other conductive plate contact is set to correspond to a preset amount of change in atmospheric pressure;
The point at which the rising atmospheric pressure reverses to falling, the point at which the falling atmospheric pressure reverses to rising, the point at which the descending atmospheric pressure exceeds the preset amount of change in atmospheric pressure, and the point at which the rising atmospheric pressure reverses to rising. The electric display type rain gauge is characterized in that an electric signal is output at each point in time when the atmospheric pressure rises above a preset amount of variation, thereby activating a predetermined indicator light of the fair or rainy display section. .

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

In the drawings, FIG. 1 schematically shows the overall structure of the display mechanism of the barometer, and FIGS. 2 to 5 show the structure of each part thereof.

First, in FIG. 1, reference numeral 10 indicates the pointer of an aneroid barometer.

The aneroid barometer forms the heart of the barometer of the present invention, but the structure of the aneroid barometer is generally well known, and the part necessary to understand the structure of the present invention is the aneroid barometer. Therefore, the aneroid barometer is simply shown in block 12.

In the electric display mechanism, the rotating shaft 14 is connected to the frame 16.
One end of this rotating shaft is equipped with a pointer detection section 18 for detecting 100 rotations of the pointer of the aneroid barometer, and the other end is equipped with a pointer detection section 18 for indicating the atmospheric pressure. A large main pointer 20 is attached.

Behind the main pointer 20, a large barometric pressure scale plate 22 of a corresponding size is fixedly installed.

The main pointer 20 and the atmospheric pressure scale plate 22 constitute an atmospheric pressure indicator 24.

Reference numeral 26 indicates a drive motor for rotating the rotary shaft 14, and a bevel gear 28a attached to the rotary shaft meshes with a bevel gear 28b fixed to the rotary shaft 14.

The display mechanism is further provided with an atmospheric pressure fluctuation tendency detection section 30, and the atmospheric pressure fluctuation tendency detection section 30 has two lead wires 32a,
It is electrically connected to the electronic display section 34 through 32b.

The electric light display section 34 is used to display by means of a lamp whether the atmospheric pressure is on an upward trend, a downward trend, or at a turning point, and will be described in detail later with reference to FIGS. 6 and 7.

The detection unit 18 for detecting the movement of the pointer 10 of the aneroid barometer is constituted by a non-contact mechanism including five photoelectric conversion elements as shown in FIG. 8, for example.

The pointer detection section 18 is supported by an insulating rotation base 36 fixed to the rear end of the rotation shaft 14 and an arm 38'.

As is clear from FIGS. 1 and 8, in the pointer detection unit 18, the pointer element 10a that attacks a part of the pointer 10 is a light emitting-light receiving element pair 18L that detects a drop in atmospheric pressure, for example.
light path and a light emitting-light receiving element pair 1B that detects an increase in atmospheric pressure.
It is assembled to selectively form or block the optical path of H.

In this configuration, if the atmospheric pressure drops and the pointer element 1
When 0a blocks the optical path of the light emitting-light receiving element pair 18L, the motor 26 is driven to rotate by the action of the triac, and the main shaft 1
4 rotates in the same direction as the movement of the pointer element 10a and by the same angle, that is, by the amount by which the atmospheric pressure has decreased.

At this time, the light emitting-light receiving element pair also rotates together with the main shaft,
The state shown in FIG. 8B is restored, both optical paths of the light emitting and light receiving element pairs are formed, the switch is opened, and the motor 26 is stopped.

In the above process in which the optical path of the light emitting-light receiving element pair 18L is blocked by the pointer element 10a, the output signal is
Turn on the indicator lamp that indicates "Atmospheric pressure decrease".

When the atmospheric pressure further decreases, the state shown in Figure 8A is reached again, and the motor continues to rotate as shown in the process described above, resulting in the state shown in Figure 8B.
to return to.

However, in this case, due to the second output signal, the indicator lamp indicating "pressure decrease" goes out and the indicator lamp indicating "rain" lights up.

If the atmospheric pressure continues to drop further, the "Rain" indicator lamp will continue to light up.

On the other hand, when the atmospheric pressure is reversed and the pointer moves in the opposite direction, and the pointer element 10a blocks the optical path of the light emitting-light receiving element pair 18H, the triac causes the motor 26 to rotate in the opposite direction, and the main shaft 14 moves towards the pointer element 10a. In the same direction and at the same angle as the movement,
In other words, it rotates as much as the atmospheric pressure increases.

At this time, the light emitting-light receiving element pair also rotates together with the main shaft,
The state shown in FIG. 8B is restored and the motor 26 is stopped.

The output signal at this time acts to light up an indicator lamp indicating "increase in atmospheric pressure."

When the atmospheric pressure further increases, the state shown in FIG. 8C is reached again, and the motor continues to rotate according to the process described above, returning to the state shown in FIG. 8B.

The output signal at this time acts to light up the indicator lamp indicating "sunny".

In another example, the pointer detection unit 18 for detecting the movement of the pointer 10 of the aneroid barometer includes an insulated rotating base 36 fixed to the rear end of the rotating shaft 14, as shown in FIG.
A pair of contact bars 38a are attached substantially parallel to each other at intervals on both sides thereof.

It is separated from 38b.

Electric contacts are fixed inside the tips of the contact bars 38a and 38b, and each contact bar has a switching circuit 4 for switching the rotation direction of the drive motor 26 using two lead wires.
Connected to 0.

A contact 10a is also attached to the tip of the pointer 10 of the barometer, and this pointer contact 10a is connected to a pair of contact bars 38a, 38b.
It is inserted between the contact points.

When the atmospheric pressure increases and the pointer 10 moves clockwise as seen in FIG. 2, the pointer contact 10a contacts the contact of the contact bar 38a, causing the drive motor 26 to rotate counterclockwise as seen in FIG.

When the drive motor 26 rotates counterclockwise, the bevel gear 2
8a.

Since the rotating shaft 14 rotates clockwise through the engagement of the rotating shaft 28b, the main pointer 20, which is fixed to the front end thereof, also rotates in the same direction.

The clockwise rotation of the main pointer 200 continues as long as the pointer contact 10a is in contact with the contact point of the contact bar 38a.

The rotating base 36 that supports the contact bars 38a and 38b is fixed to the rotating shaft 14 and rotates together with the rotating shaft.
The contact bar 38a is not unilaterally pushed and bent by the pointer contact 10a, but moves almost following the movement of the pointer 10.

When the atmospheric pressure stops rising and the clockwise movement of the barometer pointer 100 stops, the contact of the contact bar 38a that was following the pointer leaves the pointer contact 10a, and the drive motor 26 also stops.

Therefore, the main pointer 20 also stops, and the value of the atmospheric pressure measured by the barometer 12 is indicated on the scale plate 22.

Conversely, when the atmospheric pressure begins to drop, the pointer 10 moves counterclockwise as seen in FIG. 2 and contacts the contact point of the other contact bar 38b.

Then, the switching circuit 40 operates and the drive motor 26 rotates clockwise as seen in FIG. 1, and the main pointer 20 moves counterclockwise, contrary to the above case.

As long as the pointer 10 continues to move counterclockwise, the contact bar 38
b moves to follow the pointer 10 while in contact with the pointer contact 10a.

Therefore, the main pointer 20 also moves following the barometer pointer 10.

When the atmospheric pressure stops dropping and the movement of the pointer 10 stops, the contact point of the contact bar 38b that had been following the pointer bar 38b changes to the pointer contact 10a.
The drive motor 26 floats and moves away from the main pointer 20.
The movement of is also stopped and the value of atmospheric pressure is indicated on the scale plate 22.

In this way, the pointer detection unit 18 detects the movement of the barometer pointer 10 and controls the rotation of the drive motor 26, and the contact bars 38a, 38b move in accordance with the barometer pointer 10, so that the barometer pointer 10 can be moved. The main pointer 20, which is much larger than the gauge pointer 10, can be made to swing in accordance with the deflection of the barometer pointer.

Moreover, there is no need to add any additional burden to the barometer pointer 10 for this purpose.

Therefore, as long as the driving torque of the motor 26 is allowed, it is possible to incorporate a long and easy-to-see pointer for indicating atmospheric pressure depending on the location where the barometer is installed.

In order to increase the accuracy of the indication of the main pointer 20, that is, to reduce the deviation between the atmospheric pressure indicated by the barometer pointer 10 and the atmospheric pressure indicated by the main pointer 20, it is necessary to It is best to make the interval as narrow as possible.

The above-mentioned atmospheric pressure indicator 24 is for instantaneously indicating the value of the atmospheric pressure, which fluctuates from moment to moment, but as a barometer, it is also used to monitor atmospheric pressure fluctuations, or changes over time, as mentioned above. It is necessary to be able to indicate the tendency of

The electronic display section indicated by block 34 in FIG. 1 is for this purpose, and the circuit configuration is shown in FIGS. 6 and 7.

The atmospheric pressure fluctuation tendency detecting section 30 is for controlling the blinking operation of the electronic display section 34, and its configuration will be explained below in conjunction with the circuits shown in FIGS. 6 and 7 as appropriate.

The atmospheric pressure fluctuation trend detecting section 30 consists of a drive switch board 40 and a driven switch board 42. The drive switch board 40 is a conductive disk and is fixed to the rotating shaft 14 with screws 44.

Further, rod contacts 40a are attached to the conductive drive switch board 40 in parallel along the axial direction.

The other driven switch board 42 is made up of three insulating discs 460 and two conductive discs 48, 50 having a smaller diameter sandwiched between them, which are fastened and held in a stacked state with bolts and nuts.

Each insulating disc 46 and conductive disc 48, 50 has holes 46a, 4aa for passing the rod contact 40a of the drive switch board.

50a is the top.

In particular, as shown in FIG.
a and 50a are slightly shifted in the circumferential direction for reasons to be described later.While the drive switch board 40 is fixed to the rotating shaft 14, the driven switch board 42 is connected as a whole through an insulating sleeve 52. It is loosely fitted onto the rotating shaft 14 and is rotatable relative to the rotating shaft.

The drive switch board 40 and the driven switch board 42 are arranged close to each other on the rotating shaft 14, and the drive switch board 40
0 rod contact 40a into the holes 46a and 48a of the driven switch board.
, 50a (Fig. 3).

Brush electrodes 54 and 56 formed by elastic conductive pieces are brought into elastic contact with the outer peripheral surfaces of the conductive boards 48 and 50 of each of the driven switch boards.

In FIG. 4, only one brush electrode 54 is shown.

Rod contact 40a, conductive plate 48.50, brush electrode 54.5
6 and the rotating shaft 14 form part of the display control circuit of the electronic display section shown in FIG.

The display control circuit shown in FIG. 6 is a circuit for controlling the electronic display circuit shown in FIG. , connected to R2.

The control relays R□ and R2 are connected in parallel to one line of the power source 58, and the rotating shaft 14 is electrically connected to the other line.

As shown in FIG. 7, the electronic display circuit of the electronic display section includes display lamps L1. L2. L3 is connected in parallel to the power supply 60, and the branch path including the indicator lamp L1 = L 2 * L3 in the circuit is equipped with plunger armatures of control relays R1 and R2 to control energization to each lamp. C1, C2
, C2 (C3 is inserted as shown in the figure.

That is, the branch of the indicator lamp L1 has a contact 61, the branch of the indicator lamp L2 has a contact 62,62', and the branch of the indicator lamp L
A contact point 63 is provided on each of the three branch paths.

On the other hand, plungers P1. of control relays R1, R2. P2 is each equipped with a pair of armatures CbC2, C2', and C3, and the armatures C□ and C2 can open and close contacts 61 and 62, and the armatures C2 and C3 can open and close contacts 62' and 63. It is arranged like this.

Relay R1s R2 plunger P1. The operation of P2,
To explain in more detail the relationship between the opening and closing operations of the contacts by each pair of armatures installed in each sylanger, when relay R1 is not energized, plunger P□
is in a protruding state (rest position) as shown in FIG. 7, and as shown by the solid line, one armature C1 is away from the contact 61, while the other contact C2 is in contact with the contact 62. .

When relay R1 is energized, plunger P1 is attracted to the left (retracted position), bringing armature C11 into contact with contact point 61 as shown by the solid line, but armature C2 separates from contact point 62.

When the relay R1 is de-energized, the plunger P□ returns to its original rest position, so the armature C1 separates from the contact 61 and the armature C2 contacts the contact 62.

The operation of control relay R2 is similar to this.1 When relay R2 is not energized, plunger P2 is in a protruding state (rest position) as shown in the figure, and one armature C2' is in contact with contact 62'. and the other armature C3 is connected to the contact point 63.
away from

When relay R2 is energized, plunger P2 is attracted to the right (retracted position), and armature 02' is connected to contact 6 as shown by the dotted line.
2', and conversely the armature C3 contacts the contact point 63.

When the relay R2 is de-energized, the plunger P2 returns to its original rest position, so that the armature C2' contacts the contact 62' and the armature C3 separates from the contact 63.

Note that the indicator lamp L1 indicates that the atmospheric pressure is on an upward trend, and the indicator lamp L3 indicates that the atmospheric pressure is on a downward trend.

The indicator lamp L2 indicates that the atmospheric pressure is at a turning point, as will be described in detail later.

Next, the operation of the circuit shown in FIGS. 6-7 will be explained in relation to the operation of the atmospheric pressure fluctuation tendency detecting section 30 shown in FIGS. 1 and 3-5.

As described above, the barometer pointer 10 swings left and right in accordance with the rise and fall of atmospheric pressure, and the rotary shaft 14 is driven by the motor 26 and rotates following this movement.

So, suppose that the atmospheric pressure is rising and the rotating shaft 14 is driven by the motor 26 and continues to rotate clockwise.
The drive switch board 40 also rotates clockwise together with the rotating shaft 14.

Therefore, the holes 48 in the conductive board 4850 in the driven switch board 42
The swing point 40a inserted in the drive switch board 40 also rotates clockwise together with the drive switch board 40.

Since the holes 48a and 50a of the conductive plate are provided at different positions in the circumferential direction as shown in FIG. The hole 48a is in contact with the circumferential surface of the hole 48a.

Then, as shown in the circuit diagram of FIG.
8. Conductive piece 54 and lead wire 32a in contact with this
Current passes through the control relay R□.

When relay R1 is energized, plunger P1
moves back, the armature C1 comes into contact with the contact 61, and the armature C2
leaves the contact 62.

When the contact 61 closes, the indicator lamp L□ lights up, indicating that the atmospheric pressure is rising.

Regarding the indicator lamp L2, the contact 62 is opened by energization of the control relay R0, so it does not light up.

Regarding the indicator lamp L3 indicating that the atmospheric pressure is decreasing, since the swing point 40a is far from the conductive panel 50, the control relay R2 is not energized, and therefore the plunger P2 is not energized.
is in the rest position of FIG. 7, with armature C3 remaining separated from contact 63.

That is, since the contact 63 is open, the indicator lamp L3 does not light up.

By the way, as mentioned above, the driven switch board 42 is loosely fitted into the rotating shaft 14 via the insulating sleeve 52, and the brush electrodes 5 are provided on the outer peripheral surfaces of the conductive boards 48 and 50.
4.56 are in elastic contact with each other, so normally the rotating shaft 14
Even when the driven switch board 42 rotates, the driven switch board 42 does not directly follow the rotation.

The swinging point 40a is the hole 48a of the conductive plate 48.50. When it comes into contact with any of the circumferential surfaces of 50a, it is simply pushed by the swinging point and rotates to follow.

Therefore, in the case of the above-mentioned increase in atmospheric pressure, even after the swing point 40a comes into contact with the circumferential surface of the hole 48a of the conductive plate 48, as long as the atmospheric pressure continues to rise, the conductive plate 48 will be pushed toward the swing point 40a. The swinging point 40a and the conductive plate 48 remain in contact with each other.

As a result, the indicator lamp L□ continues to light up while the atmospheric pressure is rising.

If the atmospheric pressure begins to fall, the rotating shaft 14 will rotate counterclockwise following the movement of the barometer pointer 10, and the swing point 40a will also move away from the circumferential surface of the hole 48a in the conductive plate 48. Since the relay R2 is no longer energized, the indicator lamp L1 goes out.

As the atmospheric pressure continues to fall, the swing point 40a moves counterclockwise and comes into contact with the circumferential surface of the hole 50a in the other conductive plate 50, as shown in FIG.

This state is shown by the dotted line in FIG. 6, and as a result, the circuit connection is switched, and current flows to the control relay R2 via the rotating shaft 14, the swing point 40a, the conductive plate 50, the brush electrode 56, and the lead wire 32b. It gets through.

When relay R2 is energized, plunger P2 moves back to the right in the circuit of FIG. 7, armature C2' separates from contact 62', and armature C3 contacts contact 63.

Therefore, the display lamp L3 indicates that the atmospheric pressure is falling.
lights up.

As long as the atmosphere continues to fall, the swing point 40a will be the conductive plate 5.
Since it is in contact with 0, the indicator lamp L3 continues to light up.

When the atmospheric pressure starts to rise again, the rotating shaft 14 rotates clockwise again in response to the deflection of the barometer pointer 10, and the pivot point 40a
moves away from the conductive board 500 surface.

As a result, the relay R2 is de-energized and the plunger P2 returns to its rest position, so that the armature C3 separates from the contact 63 and the lamp L3 goes out.

Although it is said that an upward trend in atmospheric pressure foretells a worsening of the weather, and a downward trend heralds an improvement in the weather, a reversal change in atmospheric pressure occurs when the atmospheric pressure changes from an upward trend to a downward trend, or from a downward trend to an upward trend. If the amount is small, it is not possible to predict the weather based on it.

In reality, when atmospheric pressure "reverses" from an upward trend to a downward trend, or from a downward trend to an upward trend, unless a change of approximately 4 mb or more occurs, it cannot be said that the change in atmospheric pressure is sufficient to predict the weather. .

Considering the change in atmospheric pressure when it reverses economically, when the atmospheric pressure exceeds approximately 4 mb, we can judge that the weather is getting better or worse when the atmospheric pressure changes to an "increasing trend" or "downward trend". Can be done.

The change in atmospheric pressure during or after reversal is 4m over time.
When the weather does not exceed b, it is too early to conclude whether the weather is getting better or worse.

Therefore, in such cases, it is convenient to grasp the situation as a "day of weather change."

Indicator lamps L, L3 in the electronic display circuit of FIG. 7 indicate that the atmospheric pressure is on the rise and the weather is getting better, and that the atmospheric pressure is on the downward trend and the weather is getting worse. L2 indicates a "change in weather" in the sense described above.

In order to be able to indicate changes in the weather with the indicator lamp L2, holes 48a in the conductive board are provided so as to be offset from each other in the circumferential direction as shown in FIGS. 4 and 5.

The circumferential width of the space defined by 50a is made larger than the outer diameter of the swinging point 40a.

By doing this, when the atmospheric pressure reverses its upward trend, the swing point 40a that has started to move counterclockwise will move away from the circumferential surface of the hole 48a in the conductive plate 48 and the hole 50a in the other conductive plate 50.
A "no-contact" state occurs until it comes into contact with the peripheral surface on the opposite side.

Until the atmospheric pressure changes from a downward trend to an upward trend, the hole 48a
The same "non-contact" state occurs when the swing point 40a, which was in contact with the circumferential surface of the ball, moves clockwise.

The non-contact state in which the swing point 40a does not come into contact with any of the conductive boards 48 and 50 is the state shown by the two-dot chain line in FIG.

In the non-contact state, no current flows through either relay R1 or relay R2.

Therefore, in the circuit of FIG. 7, the relay plunger P b
Each armature of P2 is in the rest position shown by the solid line.

That is, contacts 61 and 63 are both open, and contacts 62 .
62' are both closed, so only the indicator lamp L2 is lit to indicate a change in the weather.

As mentioned above, the quantitative range of the change in atmospheric pressure during the reversal, which is displayed as a change in the weather by lighting the lamp L2, is approximately 4 mb.
Since this is appropriate, the swing point 40a must be swung without contact while it moves clockwise or counterclockwise in response to changes in atmospheric pressure not exceeding 4 mb.

Therefore, the width in the circumferential direction of the space defined by the pair of holes 48a and 50a is predetermined to a size that allows play or idle movement of the swing point 40a corresponding to a change in atmospheric pressure of up to 4 mb. .

In this way, even if the change in atmospheric pressure changes from rising to falling or from falling to rising, when the amount of subsequent change is insufficient and it cannot be concluded that the weather is improving or worsening, The display lamp L2 lights up to notify the user that the weather is changing.

FIG. 9 shows the relationship between the above-described aspects, that is, the state of atmospheric pressure fluctuation over time, the manner of contact operation of the one-atmosphere fluctuation tendency detecting section, and the display change of the fair or rainy display section.

As shown in this figure, when the atmospheric pressure tends to rise in the currently open area d3, the bar swing point 40 of the atmospheric pressure fluctuation tendency detection section
a (indicated by a black circle in FIG. 9) is one conductive board contact 48 (
6 and 7).
In accordance with the electric circuit shown in the figure, the indicator light L1 on the fair/rainy display section 34 that indicates a clear tendency is activated.

Next, in a time region d4 when the change in atmospheric pressure starts to reverse from rising to falling, the swing point 40a moves away from the conductive board contact 48 and becomes a non-contact state, and the indicator light L2 on the fair/rainy display section 34 that indicates the change in weather is activated. operate.

Further, in a time region d5 in which the atmospheric pressure continues to decrease by more than a predetermined amount of fluctuation, for example, 4 mb, the swinging point 40a contacts the other conductive board contact 50 (white circle contact on the left side in the figure). Then, according to the electric circuits shown in FIGS. 6 and 7, the indicator light L3 for displaying the rain tendency of the fair or rainy display section 34 is activated.

Time domain d6 is the initial stage of the reversal of the atmospheric pressure from decreasing to increasing, and the swing point 40a moves away from the conductive board contact 50 and becomes a non-contact state, and the indicator light L2 that indicates the change in weather on the fair or rainy display section 34 is activated. Operate.

The time region d7 is a region in which the rise in atmospheric pressure continues to rise beyond a predetermined amount of fluctuation, and the time region d7 is a region in which the rise in atmospheric pressure continues to rise beyond a predetermined amount of fluctuation, and is
comes into contact with the conductive board contact 48 and activates the indicator light L□ which displays the sunny/rainy tendency of the fair/rainy display section 34.

As described in detail above, the electric display type rain gauge of the present invention electrically detects the deflection of the pointer of the barometer that measures atmospheric pressure, and measures the momentary atmospheric pressure value using the large main pointer. In addition to giving immediate instructions, it also detects trends in atmospheric pressure changes over time from the swing of the barometer pointer to determine whether the atmospheric pressure is rising, falling, or changing from rising to falling or from falling to rising. It is possible to display an electric light to indicate what is happening.

That is, by detecting the deflection of the barometer pointer, changes in atmospheric pressure are immediately indicated by a large main pointer, and at the same time, changes in atmospheric pressure are indicated by an electronic display as a trend over time.

In either case, no additional force is applied to the movement of the barometer pointer, so the normal movement of the pointer is not disturbed.

In addition, according to the electric display type rain gauge of the present invention, the main pointer and the electric light display can be made larger or longer as necessary, so that it can be used by a large number of people both indoors and outdoors, such as on the street or inside the station premises. They can be placed in visible locations to visually inform people gathering at or passing by these locations of the general weather forecast.

[Brief explanation of drawings]

Fig. 1 is a partial side view mainly showing the structure of the display mechanism of the electric display type rain gauge according to the present invention, Fig. 2 is a partial view showing the structure of the pointer detection section different from Fig. 1, and Fig. 3 FIG. 1 is a partial cross-sectional view showing the structure of the atmospheric pressure fluctuation trend detection section in the display mechanism, FIG. 4 is a cross-sectional view showing a part of the switch section taken along line 4--4 in FIG. 1, and FIG. A partial diagram showing a further part of the atmospheric pressure fluctuation tendency detection section shown in FIG. 4, FIGS. 6 and 7 are diagrams showing the configuration of a display control circuit and a display circuit of an electric display section incorporated in the display mechanism of FIG. 1, The 8th enclosure diagram is an explanatory diagram of a light emitting-light receiving element pair showing an example of a detection unit for detecting the movement of the pointer of an aneroid barometer, and Figure 9 shows the state of atmospheric pressure fluctuation over time and the trend of atmospheric pressure fluctuation. It is an explanatory diagram of an atmospheric pressure chart showing the relationship between the mode of contact operation of the detection section and the display change of the fair or rainy display section. 10... Barometer pointer, 14... Rotation axis, 18... Pointer detection section, 20... Main pointer, 22... Atmospheric pressure Scale plate, 26...Rotary shaft drive motor, 28a28b...Bevel gear,
30... Barometric pressure fluctuation trend detection unit, 38a, 38b
...Contact bar, 40...Conductive drive switch board, 40a...Bar contact, 42...
- Driven switch board, 46... Insulation board, 48, 5
0... Conductive board, 48a, 50a... Hole in the conductive board, 54° 56... Brush electrode.

Claims (1)

[Claims for Utility Model Registration] A barometer 12 equipped with a pointer 10 that swings left and right depending on the level of atmospheric pressure; a pointer detection unit 18 at one end that detects the movement of the pointer 10 of the barometer 12; A rotating shaft 14 equipped with an atmospheric pressure display main pointer 20 that displays atmospheric pressure in analog form at an end; and a motor 26 that operates in response to a detection signal from the pointer detection section 1B to rotationally drive the rotating shaft 14. a barometric pressure fluctuation trend detection section 30 that detects a tendency of atmospheric pressure fluctuation in proportion to the atmospheric pressure fluctuation; and a fair or rainy display that displays the atmospheric pressure trend as a fair or rainy tendency in response to the output of the atmospheric pressure fluctuation trend detection section 30. a rod contact 40a attached to extend parallel to the axial direction of the rotation shaft so as to rotate together with the rotation shaft, and the rod contact 40a. Hole 48a for passing through. 50a, and the respective holes 48 are insulated from each other.
a pair of conductive plates 48, 50 assembled so that the plates 48 and 50a are offset in the circumferential direction and relatively rotatably mounted on the rotating shaft 14; and a brush that elastically contacts the outer peripheral surface of each of the conductive plates. electrodes 54 and 56, and the rod contact 40
Set the distance from when a separates from one conductive board contact to when it comes into contact with the other conductive board contact to correspond to a preset amount of change in atmospheric pressure, and determine the point at which the rising atmospheric pressure reverses to falling, and The point at which the atmospheric pressure in the air reverses to rising, the point at which the atmospheric pressure that reverses to falling falls by exceeding the preset amount of atmospheric pressure fluctuation, the point at which the atmospheric pressure that reverses to increasing rises by exceeding the preset amount of atmospheric pressure fluctuation. , respectively, to operate a predetermined indicator light of the fair/rainy display section.