Elastic vibration electric field instrument
An electric field meter and elastic vibration technology, which can be used in electrostatic field measurement and other directions to solve problems such as short service life.
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Embodiment 1
[0013] Embodiment 1: The elastic vibration type electric field instrument that produces resonance with shrapnel, its schematic diagram is shown in figure 2 .
[0014] figure 2 , when the detection panel 2 is at the position of the solid line in the figure, it is completely exposed to the external electric field. When it is at the dotted line position in the figure, it is completely within the shielding of the shell (metal plate) 15, and the shrapnel 1.4 drives the detection panel 2 to change its position, and periodically protrudes and retracts the shell (metal plate) 15; the detection panel 2 and shrapnel 1.4 are insulated and connected; in the external electric field, the current formed by the induced charge on the detection panel 2 is detected by the galvanometer 3 . Detection signal is sent in the software processor 11, at first carries out A / D conversion by A / D converter 4, then amplitude meter 5 and frequency meter 6 obtain amplitude value and frequency value, delive...
Embodiment 2
[0020] Embodiment two: the electric bell can be used to replace the vibrator. There are two kinds of electric bells, both of which can be used as the vibration driver in this program. One is direct current excitation, see diagram 2-1 . Among the figure, the spring sheet 1.4 is connected with a contact sheet 1.1. When in the state shown in the figure, because the contact screw 1.2 is connected with the contact piece 1.1, the circuit is connected, and the DC power supply makes the electromagnet 1.3 with a strong magnetic field, and the spring piece 1.4 is attracted. Cause the contact piece 1.1 and the contact screw 1.2 to leave, the current is interrupted, the magnet 1.3 loses its magnetism, the spring piece 1.4 returns to its original position with its inherent elastic force, and the contact piece 1.1 is connected with the contact screw 1.2, and the next cycle begins. Just go round and begin to make leaf spring 1.1 vibrate like this.
[0021] The advantage of this electric...
Embodiment 3
[0022] Embodiment three: another kind of electric bell is alternating current excitation, Figure 2-2 shown. In the figure, the AC driving coil 1.1 attracts and repels the magnetic sheet 1.2 alternately, and constitutes a resonant mechanism with the spring 1.3. Make the induction metal sheet fixed on the magnetic sheet 1.2, that is, the detection panel 2 protrude or retract into the grounding shell 15.
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