US 12,332,294 B2
Shielding layer detection circuit and transmission system
Lanwang Guo, Zhongshan (CN); and Daijun Jiang, Zhongshan (CN)
Assigned to Guangdong Rifeng Cable Co., Ltd., Zhongshan (CN)
Filed by Guangdong Rifeng Cable Co., Ltd., Zhongshan (CN)
Filed on May 19, 2023, as Appl. No. 18/320,950.
Claims priority of application No. 202310095268.7 (CN), filed on Feb. 6, 2023.
Prior Publication US 2024/0264216 A1, Aug. 8, 2024
Int. Cl. G01R 31/12 (2020.01); H01B 9/02 (2006.01)
CPC G01R 31/1272 (2013.01) [H01B 9/02 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A shielding layer detection circuit, applied to a power supply bus bar group, the power supply bus bar group being sheathed with a conductive shielding layer group, wherein the shielding layer detection circuit comprises:
a first resistive voltage division assembly, connected to the conductive shielding layer group to detect an electric leakage signal, wherein the electric leakage signal is used to represent that a short circuit occurs between the power supply bus bar group and the conductive shielding layer group;
a second resistive voltage division assembly, comprising a first detection terminal and a second detection terminal, wherein the second resistive voltage division assembly has the first detection terminal connected to one terminal of the conductive shielding layer group and the second detection terminal connected to the other terminal of the conductive shielding layer group to detect a breakage signal, wherein the breakage signal is used to represent that the conductive shielding layer group is broken;
a switch module, connected to the power supply bus bar group to switch a transmission line connection/disconnection state of the power supply bus bar group; and
a control module, connected to an output terminal of the first resistive voltage division assembly, an output terminal of the second resistive voltage division assembly, and a controlled terminal of the switch module, respectively, to control the switch module to be turned off when receiving either of the electric leakage signal and the breakage signal.