CN201212881Y

CN201212881Y - Pot flower water-loss monitor

Info

Publication number: CN201212881Y
Application number: CNU200820121037XU
Authority: CN
Inventors: 韩旸
Original assignee: Individual
Current assignee: Individual
Priority date: 2008-07-09
Filing date: 2008-07-09
Publication date: 2009-03-25
Anticipated expiration: 2018-07-09

Abstract

The utility model relates to a pot flower water lack monitor which comprises a power supply module, a humidity sensor, a humidity monitoring module and a water lack light indicating module, wherein the humidity sensor, the humidity monitoring module and the water lack light indicating module are connected with each other in sequence, the power supply module is connected with the humidity sensor, the humidity monitoring module and the water lack light indicating module. Because soil with various moisture has different resistivities, the humidity sensor converts the moisture content to resistance value, the humidity monitoring module drives the water lack light indicating module to indicate after judging the soil lacks water by the data of the humidity sensor.

Description

Potted flower lack of water monitor

Affiliated technical field

The utility model relates to a kind of monitoring device, especially potted flower lack of water monitor.

Background technology

Water is the indispensable material of plant growth, and whether potted plant plant need understand in the soil lack of water, depends whether moistening observe surface soil be slippery sometimes alone, and lacks a kind of soil device of lack of water whether that can monitor easily in the flowerpot at present.

Summary of the invention

In order to solve monitoring soil moisture situation about whether lacking, the utility model provides a kind of potted flower lack of water monitor, monitors moisture in the flowerpot by the mode of humidity inductive, if moisture very little, then sends light prompt.

The technical scheme that its technical matters that solves the utility model adopts is: potted flower lack of water monitor comprises power module, humidity sensor, humidity detection module, lack of water light prompt module.It is characterized in that: humidity sensor, the humidity detection module, lack of water light prompt module connects successively, power module respectively with humidity sensor, the humidity detection module, lack of water light prompt module connects.Humidity sensor converts moisture to resistance value by moisture different resistivity difference in the soil, makes prompting if the humidity detection module is judged the soil lack of water then driven lack of water light prompt module by the data of humidity sensor.

The beneficial effects of the utility model are, the soil that can put into basin easily carries out the whether judgement of lack of water of plant, and is easy to use, the judgement science.

Description of drawings

Below in conjunction with drawings and Examples the utility model is further specified.

Fig. 1 is a theory diagram of the present utility model;

Fig. 2 is an electric structural drawing of the present utility model.

Among the figure, 1. power module, 2. humidity sensor, 3. humidity detection module, 4. lack of water light prompt module.

Embodiment

In Fig. 1, potted flower lack of water monitor comprises power module 1, humidity sensor 2, humidity detection module 3, lack of water light prompt module 4 is characterized in that: humidity sensor 2, humidity detection module 3, lack of water light prompt module 4 connects successively, power module 1 respectively with humidity sensor 2, humidity detection module 3, lack of water light prompt module connect 4.Humidity sensor 2 converts moisture to resistance value by moisture different resistivity difference in the soil, makes prompting if humidity detection module 3 is judged the soil lack of water then driven lack of water light prompt module 4 by the data of humidity sensor.

The probe of humidity sensor 2 uses the steel wire of two diameter 2mm, length 100mm.

In Fig. 2, obtain DC voltage after AC transformer T1 step-down rectifier, the filtering and give circuit supply.Circuit is made up of field effect transistor, VT1, triode VT2 and one 555 time base circuit.When the soil lack of water in the flowerpot, the resistivity of soil can increase greatly, detects if the humidity sensor probe is injected flowerpot earth, and the resistance of P1, P2 point-to-point transmission is very big, the grid of N channel junction field-effect pipe VT1 is near negative supply voltage, so VT1 ends at this moment.At this moment, the base stage of transistor VT2 obtains bias current, VT2 conducting by resistance R 2, R3.VT2 emitter current potential rises, and the reset terminal of 555 time base circuits 4. pin is a high level, time base circuit work.Time base circuit is connected into a ultralow frequency multivibrator, and its oscillation frequency is about 1Hz.During time base circuit work, light emitting diode will be along with the flickering ruddiness that sends of the frequency of oscillating signal, and prompting should have been watered to potted flower.

When soil in the basin not during lack of water, the resistivity of soil is very little, " probe " P1, P2 spacing are equivalent to that very little resistance is arranged, so, the grid of VT1 be close to and connect " ", grid voltage is near 0V, conducting between drain-source the two poles of the earth, and its drain potential descends, thereby VT2 is ended, its emitter current potential also drop to " " current potential.Therefore time base circuit also quits work, and light emitting diode is also just no longer luminous.

Claims

1. potted flower lack of water monitor, comprise power module (1), humidity sensor (2), humidity detection module (3), lack of water light prompt module (4), it is characterized in that: humidity sensor (2), humidity detection module (3), lack of water light prompt module (4) connects successively, power module (1) respectively with humidity sensor (2), humidity detection module (3), lack of water light prompt module connects (4).

2. potted flower lack of water monitor according to claim 1 is characterized in that: the probe of humidity sensor (2) uses the steel wire of two diameter 2mm, length 100mm.