Electroscope with contact detection
A technology of contact detection and electroscope, applied in the direction of measuring electricity, measuring electrical variables, measuring current/voltage, etc., can solve problems such as operator misjudgment, casualties, and wrong detection results, so as to ensure safety and reduce man-made accidents , low cost effect
Pending Publication Date: 2019-07-26
YUANRANG IND SHANGHAI
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Problems solved by technology
However, most high voltage electroscopes do not have a module to ensure that the contact electrodes of the electroscope and the object under test are in correct contact.
This is likely to cause misjudgment by the operator, causing errors in the test results.
At this time, if the maintenance personnel directly repair the object under test, it may cause casualties
Method used
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[0026] Such as Figure 1-4 As shown, the present invention adds a detection device in front of the electrode contacts of the general high voltage electroscope to judge whether the measured object is in effective contact. The detection circuit of the detection device includes a current limiting resistor, an isolation optocoupler, a light emitting diode and a power supply module. When the user uses the electroscope to touch the wire, the detection circuit of the electroscope will first judge whether the electroscope is really in contact with the wire. The wires are in good contact, and then the back end of the scope can detect whether the wires are live or not.
[0027] The working principle of the present invention is as follows:
[0028] When the two tops of the U-shaped body of the electroscope are in contact with the wire, both the first electrode contact and the first electrode contact in the detection circuit will contact the wire, and the current will first pass through...
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The invention relates to an electroscope with contact detection. The electroscope is used for detecting whether a working voltage exists on an electrical device or not. The voltage electroscope comprises a high-voltage electroscope device and a detecting device. The detecting device comprises a body installed at the front end of the high-voltage electroscope device and a detecting circuit disposedin the body, wherein the detecting circuit comprises a first electrode contact, a second electrode contact, a third electrode contact, a current limiting resistor, an isolated optocoupler, a light emitting diode, a power source and a voltage dividing resistor. The first electrode contact, the current limiting resistor, an illuminator of the isolated optocoupler and the second electrode contact are sequentially connected, and the power source, a light receptor of the isolated optocoupler, the light emitting diode and the voltage dividing resistor are sequentially connected to form a circuit. Compared with the prior art, the electroscope has the advantages of contact detection, convenient measurement and the like.
Description
technical field [0001] The invention relates to a working voltage electroscope on electrical equipment, in particular to an electroscope capable of identifying safe and dangerous voltages. Background technique [0002] An electroscope is an instrument that detects whether an object is charged and roughly estimates the magnitude of the charge. The high-voltage electroscope is a high-voltage equipment whose main test equipment has a ground voltage above 1000V. At present, the known high-voltage electroscope is composed of three parts, namely a detection part, an insulation part and a handshake part. There are three types of light-emitting type, sound-light type and windmill type widely used in the market. When the operator touches the contact electrode of the electroscope to the measured object, when the measured object has a relatively high voltage relative to the ground, different types of electroscopes will prompt the operator whether the measured object is electrified in...
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IPC IPC(8): G01R19/155G01R31/00
CPCG01R19/155G01R31/00
Inventor 张宏宇王力徐翔巫世鹏
Owner YUANRANG IND SHANGHAI