Micro-current load open circuit detection circuit and terminal equipment

A technology of open circuit detection and load terminal, which is applied in the field of detection circuit, can solve the problems of difficulty in direct detection of small current load terminal open circuit, high cost, etc., and achieve the effect that it is not easy to avoid artificially, reduce cost, and have accurate detection results

Inactive Publication Date: 2021-01-26
SHENZHEN WATER WORLD CO LTD
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  • Summary
  • 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 micro-current load disconnection detection circuit and terminal equipment, aiming to solve the existing problems of direct detection of micro-current load terminal disconnection, and the high cost caused by wireless detection and easy to be avoided artificially

Method used

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  • Micro-current load open circuit detection circuit and terminal equipment
  • Micro-current load open circuit detection circuit and terminal equipment

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Embodiment Construction

[0033] It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0034] 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.

[0035] 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 micro-current load open circuit detection circuit and terminal equipment. The circuit comprises a comparison module and an alarm unit. The comparison module is connected witha main battery and a micro-current load terminal, the main battery supplies power to the micro-current load terminal, and the comparison module is located on an access of the main battery and the micro-current load terminal; the alarm unit is connected with the comparison module and the main battery, and the main battery supplies power to the alarm unit; when the access is conducted, the comparison module sends a first signal to the alarm unit; when the access is disconnected, the comparison module sends a second signal to the alarm unit; and when receiving the second signal, the alarm unit gives an alarm according to the setting. When the access is disconnected, the alarm unit gives an alarm according to the setting; the comparison module judges the sent signal by detecting the on-off ofthe access, so that the detection result is more accurate; and wireless communication is not needed, the cost can be reduced, and when the access is disconnected, the access can be found in time andis not easily avoided by people.

Description

technical field [0001] The invention relates to the technical field of detection circuits, in particular to a micro-current load disconnection detection circuit and terminal equipment. Background technique [0002] Internet of Things or anti-theft device terminals or modules 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). , usually this type of terminal module will have a small battery to ensure that the terminal module can still rely on the small battery to maintain the basic work for a period of time when the power is cut off, but for driving the sound alarm, it requires a large current In some occasions, the small battery is helpless, and the power supply of the main battery is required to realize it. The power failure detection of the power supply terminal of t...

Claims

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Application Information

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