The invention provides a 1000kV ultrahigh
voltage alternating current non-contact-type electroscopy and an
electroscope thereof, the hardware part of the
electroscope consists of a
signal acquisition module, a
signal amplification module, a
signal processing module, an analog-to-
digital conversion and
data processing module and an alarm module, the
software part thereof is divided into five stages comprising self-check, pre-check, checkup, comparison and alarm; after the self-check is passed and time
delay of 3 seconds elapses, a value, which is obtained by performing a
data acquisition in 10KHz frequency on the
electric field intensity of the working location, is regarded as a reference value for the electroscopy, the inventive reference value is an
electric field value of the on-site working location, which effectively enhances the use range and accuracy of the
electroscope; the invention implements the electroscopy in terms of
field intensity curves of space electric fields and gives a reflection of the size of the
electric field via the frequency velocity of acoustic, optical signals for the alarm, which effectually eradicates the interferences from adjacent charged equipment and settles the difficult problem of inferior repetitiveness and low accuracy of the electroscopy result which is resulted from the interference with the space
field intensity by charged bodies of the adjacent measured equipment.