JPS6022390B2 - pneumatic calculator - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a pneumatic calculator that allows various calculations to be easily selected.

2. Description of the Related Art Pneumatic computing units that control air flow, compute input pressure, and obtain the resulting output pressure have been known.

FIG. 1 is a structural diagram of such a conventional pneumatic computing unit.

In the figure, 1 is an input capsule that expands and contracts according to the input pressure supplied to the IN end, 2 is a flapper that is displaced by the expansion and contraction of the input capsule 1, and 3 is a supply that is arranged opposite to the flapper 2 and is supplied to the A/S end. A nozzle that blows out air toward the flapper 2 surface based on atmospheric pressure, 4 a throttle for adjusting the amount of air supplied to the nozzle 3, 5 a nozzle 3 fixed to its tip, and rotatable around a fulcrum 6. 7 is a relay valve that amplifies the back pressure of the nozzle 3 by the supply pressure supplied to the A/S end and outputs it to the OUT end as an output pressure.8 is a feedback beam 5 that expands and contracts with this output pressure. It is a feedback capsule that rotates the With this configuration, when the input pressure as an input signal is applied to the input capsule 1 and the flapper 2 is pushed or pulled and displaced, the gap between the flapper 2 and the nozzle 3 changes and the back pressure of the nozzle 3 changes. do. This change in back pressure is amplified by the relay valve 7 and applied to the feedback capsule 8, which causes the feedback beam 5 to be pushed up or down and rotated. Due to this rotation, the /zuru 3 also moves toward and away from the surface of the flapper 2 at the same time, and the gap between the flapper 2 and /zuru 3 changes in the opposite direction to the above change, so that the same equilibrium state as at the beginning is maintained. . At this time, if the characteristic of the amount of feedback is set to a square characteristic, a square root calculation is performed. That is, the output pressure is Po, the displacement amount of the input capsule 1 is li, the displacement amount of the feedback capsule 8 is 1i, and the amount of change in the gap between the nozzle 3 and the flapper 2 caused by the rotation of the feedback beam 5 is lf (the Ith
), the coefficient of the nozzle 3 is K, the coefficient of the feedback capsule 8 is Ko, and the amplification degree of the relay valve 7 is G.
The following formula holds.

P.

=K.G(li-lf)l.

= Shun (li-lf).・・・．・Senmata, fulcrum 6
When the length from the tip of the nozzle 3 to the tip of the nozzle 3 is L, and the rotation angle of the feedback beam 5 is 8, the following equation holds true. lf
=L (1-cos8)...■Here, the angle 8 is 4/small value (8 is the range of lo, approximately 0 to 1)
Then, the following relationship exists between lf and lo. lf=1.

2 ・・・・・・・・・・【3}
Substituting the expression '3} into the expression [1} results in the following.

l. = Akira (li-l. 2) l.

XK Sagi=li-l. 2 So.

= Evening: Old Sankichi-kyo Now, if we make the arrangements as in 1, lj and lo will have the following relationship.

li=1 evening No i=1.

・・・■Input pressure is Pi
Then, since li is in the relationship of Pi and lo wide Po, equation [4} can be expressed as follows.ノPi=P. Therefore, the square root of the input pressure becomes the output pressure, and a square root calculation is performed.

However, such a pneumatic calculator of the subordinate type can only perform one predetermined calculation (for example, the square root calculation), and has drawbacks such as a complicated operating principle and high cost.

This invention was made to eliminate these drawbacks of the conventional devices.The purpose of this invention is to be able to perform various calculations with a single device, and to simplify the operating principle to achieve high precision at a low cost. The object of the present invention is to provide a pneumatic computing unit that can perform the following calculations.

In order to achieve such an object, the present invention removably attaches a curved plate having a curved section of a predetermined shape to the flapper, and a feedback beam is passed through this curved section to control input pressure and output pressure. The structure is such that the flap is separated from the nozzle through the curved portion and the feedback beam. Hereinafter, this invention will be explained in detail by way of examples. FIG. 2 is a perspective view of an embodiment of the pneumatic computing device according to the present invention.

In the figure, 10 is an input beam having a fixed part 10a and a leaf spring part 10b, and the tip thereof is bent at right angles to form a base plate part 10c; 11 is an input beam 1 that passes through a driving body 11a
an input bellows that rotates 0 around the leaf spring portion 10b;
12 is a pipe for applying input pressure to the input bellows 11;
13 is a zero adjustment spring; 14 is a nozzle fixed to the base plate 10c; 15 is a pipe for applying supply pressure to the nozzle 14;
16 is a bearing formed on the base plate 10c, 17 is a flapper provided to face the nozzle 14, 18 is a pivot shaft fixed to the flapper 17 and rotatably supported by the bearing 16, and 19 is a pivot shaft. This is a spiral spring that is interposed between the base plate portion 10c and the flapper 17 and biases the flapper 17 to rotate in a direction to approach the nozzle 14. The flapper 17 is urged by the coil spring 19 so as to block the spout of the nozzle 14, but is pushed in the opposite direction by the feedback bellows, and the flapper 17 and the nozzle 14 are maintained at a constant gap at the point where both forces are balanced. dripping In addition, 20 is a curved portion 20
This is a curved plate having a shape of 1.a and detachably attached to the flapper 17 with screws or the like.

The curved portion 20a is formed in the shape of a function graph curve drawn by the change relationship between the x-axis, which is the first direction, and the y-axis, which is the second direction orthogonal thereto. In this embodiment, since a square root calculation is performed, the shape of the curved portion 20a is formed to match the curve of the y=branch as shown in FIG. 21 is a feedback beam that comes into contact with this curved portion 20a, and 22 is a leaf spring for supporting the feedback beam 21 having a fixed point 22a.

23 is a feedback beam 21 via a driver 23a.
24 is a pipe for applying output pressure to the feedback bellows 23, 25
The pipes 26, 27 and 15 are connected and the relay valve, 28
29 is a pipe connected between the pipes 15 and 26, and 29 is a throttle valve attached to the gap 28 for adjusting the supply pressure supplied to the nozzle 14.

The relay valve 25 inputs the nozzle back pressure from the pipe 15, amplifies the nozzle back pressure, and outputs the output pressure to the pipe 27. This world pressure is applied to feedback bellows 23 via pipe 24. In such a configuration, the input bellows 1
When an input pressure as an input signal is applied to the input beam 1 and its internal pressure increases, the input beam 10 is pushed via the driver 11a and rotates counterclockwise as seen in the figure around the spring portion 10b.

This rotation causes the curved plate 20G to rotate in the x-axis direction.
Due to this rotation, the curved plate 20 is displaced in the x-axis direction, and the curved portion 20a is separated from the feedback beam 21. As a result, the flapper 17 is rotated by the biasing force of the coil spring 19, the gap with the nozzle 14 is reduced, and the nozzle back pressure is increased. This increased pressure of the nozzle back pressure is amplified by the relay valve 25 and output. When this output pressure is applied to the feedback bellows 23, the feedback beam 21 rotates clockwise around the spring 22 via the driver 23a, is displaced in the y-axis direction, and is again moved to the curved portion 20a.
I'll put the bales on the table. As a result, the flapper 17 rotates away from the nozzle 14, and when the gap between the flapper 17 and the nozzle 14 reaches its initial state, it is balanced. Therefore, the relationship between input pressure Pi and output pressure Po is Po=ノPi
Then, the square root calculation is performed. Note that the curved portion 20a and the feedback beam 21 each move in an arc around the fulcrum spring, so if the amount of displacement is large, they will not move linearly in the x- and y-axis directions, causing errors in the calculation results. If the shape of the curved portion 20a is corrected in advance in consideration of this, highly accurate calculation becomes possible. The curved plate that determines the content of calculations can be easily removed from the flapper using screws, etc., so if you prepare multiple curved plates with curved parts of various shapes, you can perform various calculations with a single device. Can be done.

Further, even in the case of a complex x, y relationship that is not a function, calculations are performed according to the shape formed in the curved portion. FIG. 4 is a perspective view of another embodiment.

In the figure, the same or equivalent parts as in FIG. 2 are designated by the same reference numerals. 30 is a support for supporting the feedback bellows 23; 31 is a leaf spring that has a fixed point 31a and is fixed to the tip of the support 30 and deflects only in the x-axis direction; 32 has a fixed point 32a and is a support for the feedback beam 21;
This is a spring that is fixed to the tip of the spring and bends only in the x and y axis directions. Note that the substrate portion 10c is fixed to a frame or the like. In such a foundation, when the input pressure increases, the input bellows 11 pushes the support body 30, which causes the feedback bellows 23 to rotate clockwise in the figure around the spring 31. The feedback beam 21 connected thereto is displaced in the x-axis direction.

As a result, the feedback beam 21 moves away from the curved portion 20a, the flapper 17 approaches the nozzle 14, and the nozzle back pressure increases. As a result, the feedback bellows 23 expands due to an increase in the output from the relay valve 25, and the feedback beam 21 hits the curved portion 20a again, and the gap between the flapper 17 and the nozzle 14 becomes the same as at the beginning and is balanced. The embodiment is the same as that of FIG. 2, except that input pressure causes input bellows 11 to displace feedback beam 21 in the opposite x-axis direction without displacing curved portion 20 in the x-axis direction. This embodiment has a simpler structure. As described above, according to the pneumatic calculator of the present invention, various calculations can be performed with one device simply by replacing the curved plate, and since calculations are performed depending on the shape of the curved part of the curved plate, the operating principle is simple. Since the structure is simple, the cost is reduced and the calculation accuracy is improved, which are excellent effects. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a configuration diagram of a conventional pneumatic computing unit, Fig. 2 is a perspective view of an embodiment of the pneumatic computing unit according to the present invention, and Fig. 3 is a graph of the shape of a curved part. FIG. 4 is a perspective view of another embodiment.

10...Input beam, 10b...'Imitation part, 10c
...... Board part, 11... Input bellows,
14...Nozzle, 17...Flatspa, 19
...Swirl plate, 20...Curved board, 2
0a... Curved portion, 21... Feedback beam, 22... Spring, 23... Feedback bellows, 25... Relay valve.

Mulberry 7 tadazu Diamond 3 endeavor

Claims (1)

[Claims] 1. A nozzle that is fixed to a substrate and blows out air in response to supply pressure; a flapper that is rotatably supported on the substrate and is urged in a direction that faces and approaches the nozzle; a curved plate that is freely attached and has a curved portion formed in a predetermined shape according to a changing relationship between a first direction and a second direction perpendicular to the first direction; and a relay valve that amplifies the back pressure of the nozzle. , a feedback beam that abuts the curved portion, and an input bellows that displaces the curved portion in the first direction in response to a change in input pressure so that the flapper approaches the nozzle;
a feedback bellows that displaces the feedback beam in the second direction in response to a change in the output pressure of the relay valve to move the flapper away from the nozzle; A pneumatic computing unit that changes input pressure in a relationship according to the shape of the curved portion.