SU1442941A1 - Apparatus for measuring intensity of electrostatic field - Google Patents

Abstract

This invention relates to electrical measurements. The purpose of the invention is to improve accuracy and sensitivity. The device contains interconnecting shielding and movable electrodes (E) j and 2, mounted on a common va / lu 3 electric motor 4, enclosed in a common grounded electrostatic screen 5. E 1 and 2 a flat grounded screen 6 is installed. It also contains serially connected measuring E 7, amplifier 8, amplitude detector 9 and recorder 10. When measuring the floor, it is not distorted and weakened due to the presence of screen 6 before 37, since all the field lines are closed on el-1. the result of e 2 protected from nepos The primary effect of the measured field by the screen 6 and electrically connected with the E 1, which is directly exposed to this field, forms a new electrostatic field equivalent to the one being measured. This field, by rotating E 2, is converted into an electrical signal for further conversion and recording. 1 il. m (L s

Description

The invention relates to the field of electrical measurements and can be used to measure the strength of the electrostatic field. $

The purpose of the invention is improving accuracy and sensitivity.

The drawing shows a structural electrical diagram of a device for measuring the intensity of the electrostatic field.

The device contains a shielding and movable 2 electrodes, rigidly interconnected and mounted on a common shaft 3 of the electric motor 15 of the motor 4, enclosed in a common grounded electrostatic screen 5, the ground of which has a flat ground screen 6, a measuring electrode 7 connected to the input 20 amplifier 8, the output of which is sequentially through an amplitude detector 9 connected to the input of the recorder 10. The screening electrode 1 is made in the form of a disk with sector cutouts. 25 The device operates as follows.

When the electrostatic field + E ₀ acts on the shielding electrode 1 due to the forces of the electrostatic 30th interaction of charges, electric charges of different polarity are separated between the shielding 1 and the movable 2 electrodes. As a result, on the surfaces of the electrode 1, 35 facing the field lines + E _gr a negative electric charge -Q is induced, the magnitude of which is proportional to the magnitude of the field + E ₀ .

A charge + Q = l-Ql appears on the electrode 2, electrically connected 40 nom with the electrode 1. Thus, the measured electrostatic field + EO is converted into an electrostatic field equivalent to it 45, formed by the electric charges of electrode 2. This field acts on the measuring electrode 7, identical in configuration and arrangement of the sectors to electrodes 1 and 2. On the electrode 7 associated with the input of the amplifier 8, an opposite electric sign is induced. The electrodes 1 and 2, rigidly interconnected and mounted on the shaft 3 of the electric motor 4, are driven in rotation according to I VNIIPI Order 6381/43 Pro Polygraph ave, city

parking angular speed 51. As a result, a periodic signal with a frequency ilN / 2n 'is formed at the input of amplifier 8, which, after being rectified by an amplitude detector 9, enters the recorder 10, where N is the number of sectors of the electrodes 1 and 2.

When measuring the field of the proposed device does not distort it and weakening due to the presence of a flat grounded screen 6 in front of the measuring electrode 7, since all field lines are closed on the elements of the electrode 1. As a result, the electrode 2, protected from direct influence of the measured field by a flat grounded screen 6, is electrically connected with a shielding electrode 1, which is directly affected by the measured electric field, forms a new electrostatic field equivalent to yaemomu that by rotating the electrode 2 is converted into an electrical signal for further conversion and registration.

Claims (1)

Claim * A device for measuring the electrostatic field strength, including a shielding electrode made in the form of a disk with sector cutouts, and a measuring electrode mounted perpendicular to the axis of the motor shaft mounted on the motor shaft, identical in shape to the shielding electrode and mounted parallel to it, and the axis of the shielding and measuring electrodes coincide with the axis the motor shaft, and the measuring electrode is connected to the input of the amplifier, the output of which is connected to the recorder, characterized in that, in order to increase accuracy and sensitivity, a movable electrode is introduced, identical to the shielding electrode, connected to it and installed between the shielding and measuring electrodes coaxially with them on the motor shaft, and a flat electrode parallel to them is placed between the shielding and moving electrodes grounded screen. ! Circulation 772 _____ Subscription, Uzhhorod, street · Project, 4 ’