CN206523986U - Soil based on LM393 pours alarm - Google Patents
Soil based on LM393 pours alarm Download PDFInfo
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- CN206523986U CN206523986U CN201621158211.9U CN201621158211U CN206523986U CN 206523986 U CN206523986 U CN 206523986U CN 201621158211 U CN201621158211 U CN 201621158211U CN 206523986 U CN206523986 U CN 206523986U
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- soil
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- pours
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Abstract
The utility model is related to the soil based on LM393 and pours alarm, including detection device, timing means and warning device, described detection device includes probe A, B, warning device includes buzzer and light emitting diode, the dry and wet situation of soil is converted into the resistance sizes of soil between warning device and detection device by H-bridge circuit, then twin voltage comparator is passed through, voltage signal is converted into the low and high level in electronic circuit, multivibrator is constituted using 555 timers, by the self-oscillation principle of multivibrator, obtain the pulse of different duty, digital voltage signal that comparator is exported with the fixed pulse of 555 integrated chips generation by with gate circuit, produce the signal of driving triode ON, the conducting of buzzer and light emitting diode is driven with this.The utility model can be in the case of unattended, and the soil that especially some nights irrigate detects the situation of irrigation water, and according to the soil moisture threshold value of setting, send alarm.
Description
Technical field
The utility model is related to a kind of soil based on LM393 and pours alarm.
Background technology
The country is in terms of soil moisture at present, and the automatic flow watering device of with good grounds soil moisture design passes through monolithic machine examination
The low and high level of sensor output is surveyed, driving executing agency makes corresponding action, but is typically employed in the zonules such as flowerpot soil
In the range of earth, also there is a soil moisture detector, but because equipment price is expensive, be used for greenhouse cultivation for humidity requirement very
The humid control of high crops for scientific research, is not generalizable either.
China is a large agricultural country, promotes water-saving irrigation, and Developing Water-saving Agriculture is that China promotes the structure of agricultural production to adjust
Whole, reinforcement water resources management important measures, so exploring, a kind of technology is simple, and investment is small, what suitable peasant used, sexual valence
Warning system is poured than high soil to be necessary.By Modern Transducer Technology, Data Fusion technology, computer is embedding
Enter formula technology, computer network communication technology, the advanced technology such as intelligent decision making technology is combined with Engineering Control technology, for
The development of water-saving agriculture, and strengthen the intensive management of water resource, have great importance and act on.At present, in rural area large area
During manual watering, due to hypertelorism, or during night pouring, the scope of water pouring can't see, supposition or judgement intuitively,
Valve can not be closed in time, causes to pour dilutional hyponatremia, diffused out pouring scope and caused unnecessary waste, for pouring dilutional hyponatremia, cause
Situation about diffusing out, it is proposed that a kind of soil pours alarm, by judging situation of pouring water, reaches the purpose of water saving.
Utility model content
The purpose of this utility model is to pour alarm based on LM393 soil there is provided one kind in view of the shortcomings of the prior art
Device.
The utility model is adopted the following technical scheme that：
One kind pours alarm, including detection device, timing means and gate circuit and warning device based on LM393 soil,
Detection device connection twin voltage comparator output digital voltage signal, twin voltage comparator output terminal leads to timing means output end
Cross and be connected warning device with gate circuit；
The warning device includes PNP type triode, light emitting diode and buzzer, and the base stage of PNP type triode is through the
Seven resistance and it is connected with the pin of gate circuit 3, emitter stage is connected with the negative electrode and buzzer of light emitting diode, grounded collector.
The utility model be based on LM393 soil pour alarm, the detection device, 555 timers by with gate circuit
It is connected, drives triode, the conducting of diode and buzzer；
Probe in the detection device uses copper product.
Q1 plays on-off action herein, and the high level of its base stage makes triode saturation conduction, makes buzzer sounding；And base stage is low
Level then closes triode, and buzzer stops sounding.
The soil of the design pours alarm advantage and is：
Using the change principle that soil resistivity is caused according to the height of water content in soil, by the way that probe is inserted into needs
The soil edge of pouring, can detect the situation of irrigation, out-of-date when there is water to flow through, and flashing light buzzer is started working, and point out agriculture
The people close tap.Alarm obtains volumetric water content of soil information by the voltage difference at measuring probe two ends, when beyond threshold value
When, alarm signal is sent, the scheduling system that information gathering-processing-decision-making-feedback of the information-monitoring is integrated is realized.Sealing pole
It is good, can long period of soaking in water, according to soil property situation, can arbitrarily adjust, it is adaptable to various soil properties, can also be according to different plants
Different demands to moisture are arbitrarily adjusted, and practicality is very strong.
Measurement is simple, and precision is high, and the linearity is good, does not dap, does not drift about, and cost is low, is easy to carry, be applicable with it is various
Soil property, cost performance is high, facilitates the use of peasant, is adapted to the popularization in rural area.
Brief description of the drawings
Fig. 1 is the design principle figure of whole device.
Fig. 2 is the operation chart of device.
Embodiment
Further illustrated with reference to 1 to 2 pair of embodiment of the present utility model of accompanying drawing：
Soil based on LM393 pours alarm, including detection device, timing means and gate circuit and warning device, it
Based on simple electronic circuit, equipment includes probe A, B, timer, PNP triode, flashing buzzer and H bridges electricity
Road, with gate circuit, voltage comparator circuit.When large area is poured, alarm is placed on to the border in irrigated area domain of precoating, and according to soil
Matter situation, adjusts potentiometer, clockwise regulation, controls high humidity, small counterclockwise, controls threshold value, probe A, B select copper product,
A, B are inserted in soil, the dry and wet situation of soil is converted into the resistance sizes of soil by H-bridge circuit（Soil is more dry, and resistance is got over
Greatly, conversely, soil is wetter, resistance is smaller）, then by twin voltage comparator, voltage signal is converted into electronic circuit
Low and high level, multivibrator is constituted using 555 timers, and the self-oscillation principle of multivibrator obtains different duty
Pulse, the digital voltage signal that comparator is exported with 555 integrated chips generation fixed pulse by NAND gate circuit,
The signal of driving triode ON is produced, the conducting of buzzer and light emitting diode is driven with this.Can be unserviced
In the case of, the soil that especially some nights irrigate detects the situation of irrigation water, and according to the soil moisture threshold value of setting,
Send alarm.
Select R1 and R2 to be determination value in circuit, be 5.1k ohm.R3 is the soil resistance measured.In addition, for not
With if, it is desirable to which humidity is also differed, and is that this can set R4 as a variable resistor to realize.The probe for being such as 5cm with spacing
The dry ground earth resistance measured is 30k ohms, so that it may set Ri resistance to be variable in the range of 0k ohm ~ 100k ohm, can
With different according to colored kind, and different values are taken, make dutycycle more suitable.
Tested soil is inserted a probe into, as shown in Figure 2.Switch is opened, that is, is started working, module does not reach in soil moisture
During given threshold, LM393 and 74HC08 will export high level, PNP triode shut-off, alarm free sound；When the humidity in soil reaches
After to a certain extent, with diminishing for resistance, the partial pressure at resistance two ends can accordingly diminish so that less than reference voltage, so obtaining
Control signal will be converted to low level from high level.LM393 and 74HC08 will export low level；PNP triode is turned on, and is sent
Alarm.
In a word, better embodiment of the present utility model is the foregoing is only, it is all according to present utility model application the scope of the claims
The equivalent changes and modifications made, should all belong to the covering scope of the utility model patent.
Claims (6)
1. the soil based on LM393 pours alarm, it is characterised in that including detection device, timing means and gate circuit and report
Alarm device, detection device connection twin voltage comparator output digital voltage signal, twin voltage comparator output terminal and timing means
Output end with gate circuit by being connected warning device；
The detection device includes probe A, B, and from copper product, probe A connects with power supply source, by the first capacitor grounding,
First capacitance is 0.1 μ f, is connected, first resistor is fixed, is worth for 5.1k Ω with twin voltage comparator through first resistor；
Probe B also connects with ground, there is two resistance and a variable resistor between power supply source, measure after numerical value with twin voltage ratio
Compared with device connection, second resistance fixes, and is worth for 5.1k Ω, 3rd resistor is the soil resistance measured, and variable resistance is according to institute
Kind plant and soil resistance difference and take different values；
The value that probe A, B are measured respectively is converted to voltage signal via twin voltage comparator the low and high level in electronic circuit,
Connection and 1 pin of gate circuit.
2. the soil according to claim 1 based on LM393 pours alarm, it is characterised in that the twin voltage compares
Device is LM393 twin voltage comparators.
3. soil according to claim 1 based on LM393 pours alarm, it is characterised in that the timing means is
555 timers；
The pin of 555 timer 1 is grounded；2 pin are low triggering end TR；3 pin are output end；Connection and 2 pin of door gear；4 pin connect low electricity
Usually, no matter what level TR, TH are in, circuit output is " 0 ", and high level should be connect in the not used time；5 pin seal in one the 4th electricity
Hold ground connection, to prevent introducing interference；6 pin are high-triggering end TH；7 pin are discharge end, are connected with electric discharge pipe collector, when being timer
The electric discharge of electric capacity；8 pin external power supplys.
4. the soil according to claim 3 based on LM393 pours alarm, it is characterised in that the second electric capacity, the 3rd electricity
Appearance, the 4th electric capacity, size is 0.01 μ f；4th resistance, the 5th resistance value are 4.7k Ω.
5. the soil according to claim 1 based on LM393 pours alarm, it is characterised in that the warning device bag
Include PNP type triode, light emitting diode, and buzzer；
The base stage of PNP type triode is connected through the 7th resistance and with the pin of gate circuit 3, the negative electrode and honeybee of emitter stage and light emitting diode
The device that rings is connected, grounded collector.
6. soil according to claim 5 based on LM393 pours alarm, it is characterised in that the triode is
8055 triodes, the 6th resistance value is 1k Ω, and the 7th resistance value is 100 Ω.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621158211.9U CN206523986U (en) | 2016-10-25 | 2016-10-25 | Soil based on LM393 pours alarm |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621158211.9U CN206523986U (en) | 2016-10-25 | 2016-10-25 | Soil based on LM393 pours alarm |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206523986U true CN206523986U (en) | 2017-09-26 |
Family
ID=59887952
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621158211.9U Expired - Fee Related CN206523986U (en) | 2016-10-25 | 2016-10-25 | Soil based on LM393 pours alarm |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206523986U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108037712A (en) * | 2018-01-18 | 2018-05-15 | 攀枝花学院 | In the daytime intelligent irrigation circuit |
| CN108896613A (en) * | 2018-04-16 | 2018-11-27 | 华为技术有限公司 | Water logging detection device and method |
-
2016
- 2016-10-25 CN CN201621158211.9U patent/CN206523986U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108037712A (en) * | 2018-01-18 | 2018-05-15 | 攀枝花学院 | In the daytime intelligent irrigation circuit |
| CN108896613A (en) * | 2018-04-16 | 2018-11-27 | 华为技术有限公司 | Water logging detection device and method |
| CN108896613B (en) * | 2018-04-16 | 2021-06-15 | 华为技术有限公司 | Water immersion detection device and method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170926 Termination date: 20181025 |