JPS60192267A - Condenser type rotary electrostatic voltmeter - Google Patents

Abstract

PURPOSE:To remotely designate the movement of a movable electrode plate and record the movement, by changing lights reaching a photoreceptor body in accordance with the movement of the movable electrode plate by means of a light shielding plate fitted to a rotary shaft. CONSTITUTION:When a fixed electrode plate 1 is charged with electric charges, electric charges of the opposite code are produced in a movable electrode plate 2 and a shaft 3 is rotated by electrostatic attracting force acting between both electrode plates 1 and 2. Since a spiral spring 4 gives force resisting the rotation of the shaft 3 to the shaft 3, the movable electrode plate 2 stops at a position corresponding to the quantity of the electric charges given to the fixed electrode plate 1. As the shaft 3 rotates, a light shielding plate 7 is moved from the position shown by the chain line to the position shown by the solid line and a large quantity of lights is given to a solar battery 9, most part of the which is covered with the light shielding plate 7 when the voltage is ''0'', from a light emitting source 8. Therefore, the position of the movable electrode plate 2 can be known through an electric current flowing out from the solar battery 9 and an electrostatic voltage can be made to indicate.

Description

[Detailed Description of the Invention] Capacitor-type electrostatic voltmeters have a simple structure, operate sensitively, and are convenient, but cannot be used for remote indication or recording. The complicated and expensive electrostatic 1-E ratio must be used.

There are various types of capacitor-type electrostatic voltmeters, but the one that is convenient for on-site use is to attach the movable electrode plate of the capacitor to a rotating shaft with a spiral spring, and to eliminate static electricity between it and the fixed electrode plate. This is a capacitor-type rotating electrostatic voltmeter that rotates a movable electrode plate using force.

In order to eliminate the above-mentioned problem of the capacitor-type electrostatic voltage H, this invention provides a light-shielding plate on the rotating shaft that takes up the movable electrode plate of the capacitor-type rotating electrostatic type oppression, and A light emitting source is placed on one side and a photoreceptor is placed on the other side.
The light shielding plate changes the light emitted from the light emitting source and reaches the photoreceptor according to the movement of the movable electrode plate, and the photoreceptor receives the changing light and changes the light. It provides a capacitor-type rotating electrostatic voltage side that is convenient for remote instruction and recording by converting it into an electric signal and instructing the movement of the movable electrode plate.

The present invention will be explained in detail with reference to the drawings and examples.

1 and 2 show one embodiment of the invention. In Figures 1 and 2, 1 is a fixed electrode plate that together with a movable electrode plate 2 constitutes a capacitor, and the movable electrode plate 2 is fixed to a shaft 3 and has a structure that allows it to rotate within a certain angle range. Due to its rotation, the fixed electrode plate 1
.

As a result, the effective area of the movable electrode plate 2 as a capacitor changes. One end of a spiral spring 4 is fixed to the shaft 3, and the other end is extended to a fixed arm 6.

In addition, a light shielding plate 7 is located on the shaft 3, and the light shielding plate 7
A light emitting source 8 is provided on one side of the illumination device, and a solar cell 9 is provided as a photovoltaic element on the other side.

In FIGS. 1 and 2, the movable electrode plate 2 and the light-shielding plate 7 are indicated by chain lines as 2' and 7, respectively.
That is, each position is shown when the voltage is 0. When the voltage of the solar cell is 0, most of the solar cell 9 is placed so that it is covered with a light shielding plate, and the light emitting source 8 can illuminate the entire solar cell 9.

The light source may be a light bulb that maintains a constant luminous intensity, or it may be external light introduced through an optical fiber.

When a charge is accumulated on the fixed electrode plate 1, a charge of the opposite sign is generated on the movable electrode plate 2, and the marisuke 3 is rotated by the electrostatic attractive force acting between the two electrode plates.

Since the spiral spring 4 applies a force J to the shaft 3 that resists the rotation of the shaft 3, the movable electrode plate 2 comes to rest at a position corresponding to the amount of charge acquired by the fixed electrode plate 1KLi. This position is indicated by the solid line in FIG. As the shaft 3 rotates, the light shielding plate 7 also moves from the position indicated by the chain line to the position indicated by the solid line. Therefore, when the voltage is 0, the light from the light emitting source 8 is applied to the solar cell 9, most of which is covered with the light shielding plate 7, at its wide end. Since the amount of this light changes depending on the position of the light shielding plate 7, the current flowing out from the solar cell also changes accordingly.

Therefore, the position of the movable electrode plate can be determined by this current, and the electrostatic voltage can be indicated.

As another embodiment of the present invention, a semiconductor device detection element is placed in place of the solar cell 9 in FIGS. The light from the light emitting source 8 is made to reach the semiconductor device detection element only through the hole. In this case, as the light passes through the pores as the movable electrode plate moves, it moves over the detection element of the semiconductor device, so it is possible to detect the position of this light, know the position of the movable electrode plate, and instruct the electrostatic voltage. can. 3, 4, and 5 are drawings showing still another embodiment of the present invention. In FIGS. 3 and 4, the light shielding plate 1 is located on the same axis as the movable electrode plate, and the light shielding plate 1 is located on the circumference centered on the center of the axis. pores or slits are provided at regular intervals on one side of the light shielding plate 1, and two light transmitting fibers 3 and 4 are provided at regular intervals on the circumference of the pores on one side of the light shielding plate 1. Light-receiving fibers 3 and 4' are provided at positions corresponding to the respective light-transmitting fibers of 11411, and light flowing through each pair of optical fibers is interrupted by rotation of the light-shielding plate.

FIG. 5 is a diagram showing a method for determining the distance between two pairs of optical fibers. If the diameter of pore 2 is a, the width of the light shielding plate between adjacent pores is b, and the diameter of the light beam is d, then the width 1] is b) ('], 5\2) (1 In this case, the spacing between the optical fibers may be set to n (a-1-b) - (0.5 to 1., (1)d, where 1] is an arbitrary integer.

In Figure 5, n = 'l, and the distance between the optical fibers is a + b.
-1-d.

Each receiving fiber is connected to a photoelectric switch, and if the structure is such that the photoelectric switch turns off when the light flowing through the optical fiber is blocked by the light blocking plate, and turns on when the light flows, these two The on/off state of the photoelectric switch is processed as follows, and the light shielding plate 1 is
You can know the movement of

The counting circuit is turned on only when both of the first two photoelectric switches are off, and then only the switch that is turned on first adds 1 or adds 1 minus. This will be explained with reference to FIG. 5. In the position shown in the figure, the counting circuit is in an on state. When the switch connected to the optical fiber on the right side of the diagram is turned on, -1 is added, and when the switch connected to the optical fiber on the left side is turned on, -1 is added. Since it is the photoelectric switch on the right that turns on, add 1.

Immediately after this addition is performed, the counting circuit is turned off and does not operate until both of the photoelectric switches are turned off again. When the light shielding plate 1 continues to move to the left, an addition of "-1" is performed. Next, when the light shielding plate 17 moves to the right, both of the two photoelectric switches are turned off and the counting circuit is turned on.The first photoelectric switch that is turned on is the one on the left. The counting circuit is immediately turned off as soon as the addition of .

In this way, the movement of the light shielding plate 1 can be digitally displayed, and therefore the electrostatic voltage can be displayed. The nine-fiber method eliminates the need to pass current through the hazardous area by placing the photoelectric conversion and calculation processing parts in a non-hazardous area and connecting them to the electrostatic voltage side installed in the hazardous area using the original fiber. This is a major advantage of safety management.

``Instead, instead of using such an optical fiber, I decided to place a light emitting diode at the position of the above-mentioned light transmitting fibers 3 and 7+, and a fumetode at the position of the light receiving fibers 3 and 71, respectively.'' :It is also possible to indicate electrostatic voltage without using optical fiber.

[Brief explanation of drawings]

FIG. 1 is a plan view showing an embodiment of the present invention, and FIG.
The figure is a sectional view taken along AB OC in FIG. 1. J...Fixed electrode plate, 2...Movable electrode plate, 2.Position of movable electrode plate when electric ImoO, 3.Storage, 4...Spiral spring, 5..Bearing, 6.Spiral is Fixed arm, 7... Light shielding plate, 7' - Position of light shielding plate when voltage is 0, 8... Light emitting source, 9... Solar cell Figures 3, 41 and 5 are as follows:
FIG. 4 is a cross-sectional view taken along A I3 of FIG. 3, and FIG. 5 is a drawing showing the relationship between the pore spacing and the position of the optical fiber.

Claims (1)

[Claims] (1) In a condenser-type rotary electrostatic BE meter, a light shielding plate is placed on the shaft of the movable electrode plate,
A light emitting source is provided on one side of the light shielding plate, and a light receiving body is provided on the other side of the light shielding plate.
The light reaching the photoreceptor is changed according to the movement of the movable electrode plate, the changing light is received by the photoreceptor, and the change in light is converted into an electrical signal to direct the movement of the movable electrode plate. Condenser type rotary electrostatic voltmeter (2) In the above item (1), a photovoltaic element is used as the photoreceptor, and the view of the light emitted from the light source to the photoreceptor is adjusted by the movement of the light shielding plate, and the photovoltaic element is generated. A capacitor-type rotary voltmeter that instructs the movement of a movable electrode plate by changing the amount of electricity generated (3) In item (2) above, a semiconductor device detection element is used instead of a photovoltaic element, and a The light from the light emitting source reaches the semiconductor device detection element only through one pore.The position of the light that has reached the semiconductor device through the pore is detected by the semiconductor device detection element to indicate the position of the movable electrode plate. Capacitor-type rotating electrostatic voltmeter (4) In item (1) above, pores are provided in the light-shielding plate at equal intervals on the circumference with the axis of the light-shielding plate intersected in the upper middle, and the light-shielding 2 on the circumference of that pore on one side of the plate.
Light transmitting fibers are provided at regular intervals, and receiving fibers are provided at positions corresponding to the light transmitting fibers on the other side of the light shielding plate. When the light shielding plate is simultaneously blocked by the two optical fibers, and the light shielding plate rotates in one direction, the light passes through one pair of optical fibers before the other pair. When the light-shielding plate rotates in the other direction, the light passes through the other pair of optical fibers first, and the direction and amount of rotation of the light-shielding plate are detected by the interruption of the light, and the movable electrode plate A condenser-type rotating electrostatic voltage that directs the position of the movable electrode plate is used. type rotating electrostatic voltmeter