Load disconnection detection circuit and wired terminal device

A technology of load terminal and open circuit detection, which is applied in the direction of continuity test, instrument, alarm, etc., can solve the problem that the main battery terminal is difficult to detect, and achieve the effect of accurate detection result and accurate detection structure

Active Publication Date: 2021-02-02
SHENZHEN WATER WORLD CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The main purpose of the present invention is to provide a load disconnection detection circuit and a wired terminal device, aiming to solve the problem that the main battery terminal is difficult to detect when the existing terminal module is artificially disconnected from the main battery terminal during sleep or in the shutdown state question

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  • Load disconnection detection circuit and wired terminal device

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Embodiment Construction

[0031] It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0032] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0033] Those skilled in the art will understand that unless otherwise stated, the singular forms "a", "an", "" "above" and "the" used herein may also include plural forms. It should be further understood that the word "comprising" used in the description of the present invention refers to the...

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Abstract

The invention discloses a load open circuit detection circuit and a wired terminal device. The circuit comprises a detection module and an alarm unit. The detection module is connected with a main battery and a load terminal, the load terminal is used for controlling connection or disconnection of the detection module, and the main battery is connected with the power end of the load terminal and the ground through the detection module to form a loop; the alarm unit is connected with the loop and the main battery, and the main battery supplies power to the alarm unit; the main battery is electrically connected with the load terminal and supplies power to the load terminal; when the loop is conducted, the alarm unit acquires a first signal; when the detection module is disconnected with theload terminal, the loop is disconnected, and the alarm unit acquires a second signal; when the alarm unit obtains the second signal, an alarm is given out according to setting. The detection module timely sends a signal to inform the alarm unit by detecting on-off of a loop, so that the detection structure is more accurate; main battery end detection is not needed, the detection result is more accurate, and disconnection of the load terminal can be found in time.

Description

technical field [0001] The invention relates to the technical field of detection circuits, in particular to a load breaking detection circuit and a wired terminal device. Background technique [0002] The terminals or modules of the Internet of Things or anti-theft devices generally consume very low power consumption when they are in standby. In order to save power, such terminal modules generally work alternately in periodic sleep and receiving states. The lowest sleep current in standby is even lower than one microampere ( 1uA), if it is artificially disconnected from the main battery terminal during the sleep period of the terminal module or in the shutdown state, the main battery terminal is difficult to detect. Contents of the invention [0003] The main purpose of the present invention is to provide a load disconnection detection circuit and a wired terminal device, aiming to solve the problem that the main battery terminal is difficult to detect when the existing te...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/54G08B21/18
CPCG01R31/54G08B21/185
Inventor 蒋壮张立新魏科文林侃
Owner SHENZHEN WATER WORLD CO LTD
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