Microwave sensing automatic urinal

Abstract

The invention disclosed a microwave sensing automatic urinal, comprising a urinary hopper, a flushing pipeline and a microwave probe arranged at the ceramics back of urinary hopper. The microwave probe is connected with a controller sequentially through a signal processing circuit, a signal amplifying circuit and an analog/digital converting circuit; the controller is connected with an electromagnetic valve through an electromagnetic valve driving circuit, and also connected with a timing circuit for controlling water flushing time; and power supply of the whole circuit is supplied by an external power source. The microwave sensing automatic urinal utilizes Doppler effect of microwave to closely detect the flowing liquid with a detection range of about 90 mm; only the urinate instead of a human body is detected so as to prevent incorrect operation and avoid surface reflection and influence of external factors; the microwave probe is arranged at the ceramics back of urinary hopper so that the problem of installing the automatic sensing urinal in a narrow space is solved. Accumulated water is unlikely to generate, and influence of humidity at the front side is avoided.

Description

technical field [0001] The invention relates to a sensing device, more precisely, it is a microwave sensing device that uses the Doppler phenomenon of microwaves to detect flowing liquids at close range instead of detecting human bodies, thereby judging whether there are people in the room, and then deciding whether to flush water quantitatively. Automatic urinals. Background technique [0002] The existing induction probe is mainly based on active infrared induction. Its working principle is that the infrared probe emits infrared rays, and by receiving the reflection, judges the object and realizes the function of water supply or water stop. This kind of infrared sensing is easily disturbed by the environment. Although the coded transmission and reception processing program is applied, its surface reflection is unavoidable. When light or sunlight shines on the surface, interference will also occur, and it is easy to mistakenly discharge water, resulting in waste of water re...

AI Technical Summary

Problems solved by technology

This kind of infrared sensing is easily disturbed by the environment. Although the coded transmission and reception processing program is applied, its surface reflection is unavoidable. When the light or sunlight shines on the surface, it will also cause interference, and it is easy to mistakenly discharge water, resulting in waste of water resources.

In addition, the sensing probe part is easily affected by moisture, which will form water in the probe and damage the probe

Moreover, when people walk in front of the induction probe, there will be a phenomenon of mistaken water discharge when it is inconvenient, which will waste water resources instead.

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