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Grounding safety protection detector

A safety protection and detector technology, applied in instruments, measuring electricity, measuring devices, etc., can solve problems such as failure and fatality, and achieve the effect of long life, no mechanical action, and reliable work.

Active Publication Date: 2017-07-14
NANJING UNIV OF INFORMATION SCI & TECH
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  • Abstract
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Problems solved by technology

As we all know, the ground wire is the key line to protect people's life safety. With the long-term use of the wire, sometimes it will fail, which will become a killer that threatens people's lives.
[0003] Nowadays, there are more and more elderly people at home and patients with heart and brain diseases. Once an electric shock occurs, even if it trips, the current will be fatal.

Method used

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  • Grounding safety protection detector

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Embodiment Construction

[0014] The present invention will be further described below in conjunction with the accompanying drawings.

[0015] The national standard stipulates that the three-pin socket should be the phase line on the left, the neutral line on the right, and the protective grounding line in the center. Such as figure 1 As shown in the schematic diagram, it can be seen that when in use, the circuit port at the resistor R1 is connected to the L line, the circuit port at the resistor R3 is connected to the N line, and the circuit port at the resistor R2 and the resistor R4 is connected to the ground wire. After the input terminal of the transformer is connected with the phase line and neutral line, it provides DC5V power supply for the detector.

[0016] When the three wires are in good condition, the positive pole of D1 is at high potential, SW1 is turned on, and the N line and the ground wire are at low potential, that is, the positive pole of D2 is at low potential. Positive 5V forms a...

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Abstract

The invention discloses a grounding safety protection detector. The input ends of a first switch circuit SW1 and a second switch circuit SW2 are connected and then are communicated with a power supply circuit, the output end of the first switch circuit SW1 is serially connected with a light emitting diode D3 and a resistor R6 and then is grounded, the output end of the second switch circuit SW2 is serially connected with a light emitting diode D4 and a resistor R5 and then is grounded, the serial circuit of a resistor R1 and a resistor R2 is in parallel connection with the serial circuit of a resistor R3 and a resistor R4, the input end of the diode D1 is connected with the resistor R1 and the resistor R2, the output end of the diode D1 is connected with the enable end of the first switch circuit SW1, the input end of the diode D2 is connected with the resistor R3 and the resistor R4, and the output end of the diode D2 is connected with the enable end of the second switch circuit SW2. The grounding safety protection detector is reliable in work and long in service life, and has no mechanical motion.

Description

technical field [0001] The invention relates to a grounding safety protection detector, which belongs to the technical field of circuit detection. Background technique [0002] With the increasing development of household appliances, electricity safety has long been an important issue. As we all know, the ground wire is a key line to protect people's life safety. With the long-term use of the wire, sometimes it will fail, which will become a killer that threatens people's lives. [0003] Nowadays, there are more and more elderly people at home and patients with heart and brain diseases. Once an electric shock occurs, even if it trips, the current will be fatal. This fact is not uncommon, and the security of the ground line has virtually left as the patron saint of people's expectations. Contents of the invention [0004] Purpose: In order to overcome the deficiencies in the prior art, the present invention provides a grounding safety protection detector. [0005] Techni...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/00
CPCG01R31/00Y02B20/30
Inventor 孙心宇徐志远王永弟
Owner NANJING UNIV OF INFORMATION SCI & TECH
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