Water immersion detection circuit with ultra-low standby power consumption

Abstract

The invention relates to the technical field of sensors, and in particular relates to a water immersion detection circuit with ultra-low standby power consumption. The circuit comprises a sensor signal trigger processing module, the sensor signal trigger processing module is connected with the positive and negative ends of a power supply through a switch tube, and after the switch tube is switched on, the power supply supplies power to the sensor signal trigger processing module, and the sensor signal trigger processing module sends out a predetermined signal; the circuit further comprises a first probe and a second probe which are used for detecting whether water leaks or not and do not make contact with each other, the first probe is connected with the negative electrode of the power supply through the switch tube, and the second probe is connected with the positive electrode of the power supply. After the structure is adopted, a microprocessor, a related signal transmitting module, an alarm module and the like do not work before the water immersion detection circuit makes contact with water leakage, and low power consumption and ultra-long standby time of the water immersion sensor are achieved.

Description

technical field [0001] The invention relates to the technical field of sensors, in particular to a water immersion detection circuit with ultra-low standby power consumption. Background technique [0002] In daily life, we often encounter water leakage from tap water at home, or leakage from heating in the north, or leakage from water pipes in winter, which will bring considerable economic losses to the home or the neighbors downstairs, and bring great harm to family life. Inconvenient, the water immersion sensor can alarm in time to remind the user to deal with it immediately. [0003] Although the water immersion sensor can alarm in time and remind the user to deal with the water leakage problem immediately to avoid serious economic losses caused by water leakage, the use of the water immersion sensor is basically after the decoration is completed, and it is not suitable to connect the power supply to the water immersion sensor all the time. It is inconvenient, and on the...

AI Technical Summary

Problems solved by technology

[0003] Although the water immersion sensor can alarm in time and remind the user to deal with the water leakage immediately to avoid serious economic losses caused by water leakage, the use of the water immersion sensor is basically after the decoration is completed, and it is not suitable to connect the power supply to the water immersion sensor all the time. It is inconvenient, and on the other hand, it is not beautiful, which requires the water immersion sensor to have a long standby time, such as more than one year, but the water immersion alarms on the market basically use two probes + single-chip microcomputer to detect two The voltage change on each probe, which requires the single-chip microcomputer of the water immersion sensor to be in working condition all the time, such as:

Images