CN205196813U - Sprayer electron liquid level switches system - Google Patents
Sprayer electron liquid level switches system Download PDFInfo
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- CN205196813U CN205196813U CN201521018713.7U CN201521018713U CN205196813U CN 205196813 U CN205196813 U CN 205196813U CN 201521018713 U CN201521018713 U CN 201521018713U CN 205196813 U CN205196813 U CN 205196813U
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Abstract
The utility model relates to an agricultural plant protection machinery and pesticide application technology field especially relate to the trail behind sprayer electron liquid level switches system of accurate variable. Sprayer electron liquid level switches system, including dropping into formula level gauge (2), for military use anticorrosive air guide cable (3), level gauge display instrument (4), battery (5), slotted hole department bottom the medical kit is installed to the formula of input level gauge, the formula of input level sensor probe part is installed inside the medical kit, the formula of input level sensor connects the outside at the test container with for military use anticorrosive air guide installation of cable through the resistance to compression, for military use anticorrosive air guide cable links to each other with level gauge display instrument, level gauge display instrument still is connected with the battery. The utility model discloses can effectively detect content in the medical kit, avoid the pesticide volume of spraying too much or problem too little. The simultaneous design density relation of sensing diaphragm with the liquid medicine that awaits measuring, under this condition, make the utility model discloses the precision that the circuit acquireed the data processing data obtains further improvement, and the precision can reach in the 0.2cm error range.
Description
Technical field
The utility model relates to agricultural plant protection machinery and pesticide application technology field, particularly relates to a kind of precisely variable trail-type sprayer electronic level display system.
Background technology
There is the pesticide spraying of 100,000,000 tons in annual China in farmland, but research serious in the technical know-how of China in Pesticide use and technical measures is not enough.Although the sprayer that large-scale farm has some medium-sized or large-scale, of low quality due to machine itself, operation technique level is limited, and the effective rate of utilization of agricultural chemicals only has 10% ~ 30%, far below the average level of developed country 50%.For the control of the pesticide spraying amount in region, fixing farmland, there are two kinds of modes at present: the first, use knapsack sprayer, by the surplus of agricultural chemicals in eye recognition medicine-chest, judge whether this region pesticide spraying meets the demands.Because knapsack sprayer manpower drives the pressure caused to be inevitable, pressure transient impels the flow of sprayer, and droplet size, at any time in change, is difficult to the uniformity ensureing pesticide spraying in region, farmland; The second, use trailer sprayer, compare knapsack sprayer, although ensure the uniformity of pesticide spraying in region, farmland, the fountain height of agricultural chemicals in medicine-chest cannot be monitored.Pesticide spraying is excessive, indirectly to environment, can destroy the ecological balance, more can seriously work the mischief to human body; Pesticide spraying is few or do not have pesticide spraying to the area of medicine, due to the animal migration of insect, will cause insect gather region, until one period agricultural chemicals decompose volatilization after, these areas just become new round insect pest cradle.
Utility model content
The purpose of this utility model is that providing one to be applied in medicine-chest solves sprayer in pesticide spraying process, real-time and precise cannot monitor medicine-chest Pesticides surplus, the sprayer electronic level display system of the problem causing pesticide spraying amount too much or very few.
The purpose of this utility model is achieved in that
Sprayer electronic level display system, comprise called putting-into-type liquid level meter 2, military anticorrosion air guide cable 3, liquid level gauge Displaying Meter 4, accumulator 5, called putting-into-type liquid level meter is arranged on slotted eye place bottom medicine-chest, throw-in type liquid level sensor probe segment is arranged on medicine-chest inside, throw-in type liquid level sensor is arranged on the outside of test container by resistance to compression joint and military anticorrosion air guide cable, military anticorrosion air guide cable is connected with liquid level gauge Displaying Meter, and liquid level gauge Displaying Meter is also connected with accumulator.
Described called putting-into-type liquid level meter is made up of resistance to compression joint 6, ceramic capacitive pressure sensitive sensor 7, pressure-sensitive diaphragm 8 and stainless steel cylinder core 9, pressure-sensitive diaphragm, ceramic capacitive pressure sensitive sensor are encapsulated in stainless steel cylinder core inner by resistance to compression joint, sensor diaphragm is arranged on the top of stainless steel cylinder core, and ceramic capacitive pressure sensitive sensor is connected with liquid level gauge Displaying Meter by military anticorrosion air guide cable.
Described liquid level gauge Displaying Meter is made up of electronic device, and 3A electric current output buck switching mode integrated stable voltage circuit LM2576 first pin connects 12V positive source and the first electric capacity C1, the other end ground connection of the first electric capacity respectively;
3rd pin of 3A electric current output buck switching mode integrated stable voltage circuit LM2576 and the 5th pin ground connection;
Second pin of 3A electric current output buck switching mode integrated stable voltage circuit LM2576 connects Schottky diode D1 positive pole and the first inductance, the minus earth of Schottky diode respectively;
4th pin of 3A electric current output buck switching mode integrated stable voltage circuit LM2576 connects the 20 pin of the other end of the first inductance, one end of the second electric capacity and single-chip microcomputer STC12C5412AD respectively;
3A electric current output buck switching mode integrated stable voltage circuit LM2576 the 7th, eight, nine, 12 pins connect LED nixie display DPY-4-LED output display data respectively;
First pin of 3A electric current output buck switching mode integrated stable voltage circuit LM2576 connects one end of the 6th electric capacity and the 9th resistance R1 respectively, and the other end of the 6th electric capacity connects 5V positive source, the other end ground connection of the 9th resistance;
4th pin of 3A electric current output buck switching mode integrated stable voltage circuit LM2576 connects one end of crystal oscillator and one end of the 3rd electric capacity C3, the other end ground connection of the 3rd electric capacity respectively;
5th pin of 3A electric current output buck switching mode integrated stable voltage circuit LM2576 connects the other end and the 4th electric capacity C4 of crystal oscillator, the other end ground connection of the 4th electric capacity respectively;
The tenth pin ground connection of 3A electric current output buck switching mode integrated stable voltage circuit LM2576;
Second, third pin of low-power consumption transceiver MAX485 connects the 6th pin of 3A electric current output buck switching mode integrated stable voltage circuit LM2576 respectively;
4th pin of low-power consumption transceiver MAX485 connects the 3rd pin of 3A electric current output buck switching mode integrated stable voltage circuit LM2576;
First pin of low-power consumption transceiver MAX485 connects second pin of 3A electric current output buck switching mode integrated stable voltage circuit LM2576;
The 5th pin ground connection of low-power consumption transceiver MAX485, the 8th pin connects 5V positive polarity;
16 pin of 3A electric current output buck switching mode integrated stable voltage circuit LM2576 connects one end of the 5th electric capacity C5 and the tenth resistance R2, the other end ground connection of the 5th electric capacity, the other end of the tenth resistance connects one end of the 11 resistance and the signal input part of liquid level ceramic capacitive pressure sensitive sensor, the other end ground connection of the 11 resistance respectively;
13 and the 8th pin ground connection of shift register 74HC595; The 16 of shift register 74HC595 is connected 5V positive source with the tenth pin;
11 pin of shift register 74HC595 connects the 15 pin of 3A electric current output buck switching mode integrated stable voltage circuit LM2576;
12 pin of shift register 74HC595 connects the 14 pin of 3A electric current output buck switching mode integrated stable voltage circuit LM2576;
14 pin of shift register 74HC595 connects the 13 pin of 3A electric current output buck switching mode integrated stable voltage circuit LM2576;
First to the 7th pin and the 15 pin of shift register 74HC595 are connected one end of the first to the 8th resistance respectively, the other end connecting luminous diode respectively of the first to the 8th resistance, and light emitting diode connects 5V positive source;
Ceramic capacitive pressure sensitive sensor connects 12V positive source.
The first described electric capacity is 100 μ F, second electric capacity is 1000 μ F, 3rd electric capacity and the 4th electric capacity are 22pF, 5th electric capacity is 0.1 μ F, and Schottky diode model is IN5819, and crystal oscillator is 12Hz, first to the 8th resistance is 82 Ω, 9th resistance is 10k Ω, and the tenth resistance is 10k Ω, and the 11 resistance is 250 Ω.
The pressure of described called putting-into-type liquid level meter test is: P=ρ .g.h, and in formula, P is that transmitter meets liquid level pressure, and ρ is fluid to be measured density, and g is local gravitational acceleration; H is the degree of depth that transmitter drops into liquid.
Pass between the area of described pressure-sensitive diaphragm and water density is:
S＝-0.0783ρ
2+1.2391ρ
S is pressure-sensitive diaphragm area, unit cm
2, S=π R
2, R pressure-sensitive diaphragm radius is 0.5≤ρ≤14.
The beneficial effects of the utility model are:
The utility model can effectively detect content in medicine-chest, avoids the problem that pesticide spraying amount is too much or very few.Devise the density relationship of pressure-sensitive diaphragm and liquid to be measured, under this condition, the precision making the utility model circuit obtain data processing data is further enhanced, and precision can reach in 0.2cm error band simultaneously.
Accompanying drawing explanation
Fig. 1 is overall structure schematic diagram of the present utility model;
Fig. 2 is called putting-into-type liquid level meter structural representation of the present utility model;
Fig. 3 is liquid level gauge Displaying Meter structural representation of the present utility model;
Fig. 4 is liquid level gauge Displaying Meter circuit diagram of the present utility model.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described further.
This called putting-into-type liquid level meter precisely can not only monitor medicine-chest Pesticides surplus, and when medicine-chest agricultural chemicals is not enough, by its peripheral circuit alarm, can carry out supplementary agricultural chemicals function to medicine-chest.
The utility model solve that its technical problem adopts technical scheme be: called putting-into-type liquid level meter is arranged on slotted eye place bottom medicine-chest, throw-in type liquid level sensor probe segment is arranged on medicine-chest inside, and resistance to compression joint and air guide cable are arranged on medicine-chest outside.The principle that called putting-into-type liquid level meter is directly proportional to this liquid height based on surveyed fluid pressure, adopts the piezoresistive effect of ceramic capacitive pressure sensitive sensor static pressure to be transferred to 4 ~ 20mA standard electric signal, and combined with liquid level gauge Displaying Meter, realizes Automated condtrol.Before operation, can be observed by numeral method or LED by liquid level gauge Displaying Meter and set the minimum and maximum capacity of agricultural chemicals in medicine-chest, to exceed or lower than its setting range, charactron is by the liquid level sensor outputting standard signal of telecommunication, after sprayer electronic level display system carries out data processing, charactron shows corresponding medicine-chest herb liquid surplus.Another display mode, forms a row liquid level indicator lamp by 8 LED.According to medicine-chest capacity, the light on and off carrying out arranging LED demonstrate the liquid surplus of medicine-chest more intuitively.Such as medicine-chest capacity is 1000L, and 8 LED lampets represent 125L liquid respectively, when 8 LED are all lighted, during namely medicine-chest is in and is fully loaded with.During operation, when often spraying 125L liquid, LED is extinguished from top to down successively, until during the flicker of last LED of below, represent medicine-chest herb liquid less than 125L, namely can alarm operator should to stop operation or to carry out liquid supplementary.In operation, operating personnel can in tractor cab, and the moment observes medicine-chest Pesticides and sprays situation, thus reaches the object of accurate pesticide spraying.
After program enters principal function, first single-chip microcomputer and all peripheral hardwares are initialized, then systemic circulation is entered, first the signal of telecommunication whether pin that single-chip microcomputer is connected with liquid level sensor receives liquid level sensor and gather is waited in circulation, change into 1-5V voltage by the resistance in 250 Europe, pass to single-chip microcomputer.Program carries AD by single-chip microcomputer receive signal in circulation after and the transform electrical signals received is become data signal, then the data signal after conversion is passed through the serial input of pin one in latch, finally by latch parallel output, control digital pipeline section and select data, control light emitting diode simultaneously and light number.
1. medicine-chests, 2. called putting-into-type liquid level meter in figure, 3. military anticorrosion air guide cable, 4. liquid level gauge Displaying Meter, 5. accumulator, 6. resistance to compression joint, 7. ceramic capacitive pressure sensitive sensor, 8. pressure-sensitive diaphragm, 9. stainless steel cylinder core
In Fig. 1, medicine-chest (1), called putting-into-type liquid level meter (2), military anticorrosion air guide cable (3), liquid level gauge Displaying Meter (4), accumulator (5), forms accurate pesticide spraying amount monitoring system.Called putting-into-type liquid level meter utilizes static pressure measurement principle, when called putting-into-type liquid level meter is arranged on medicine-chest (1) bottom, the static pressure of agricultural chemicals directly acts on pressure-sensitive diaphragm (8), static pressure is directly proportional to the height of fluid to be measured, the static pressure that liquid level produces makes pressure-sensitive diaphragm (8) generation displacement act on ceramic capacitive pressure sensitive sensor (7) and produce the change of capacitance, directly be connected with liquid level gauge Displaying Meter (4) by military anticorrosion air guide cable (3), amplify and be converted to standard signal, after liquid level gauge Displaying Meter (4) process, precisely demonstrate the numerical value of medicine-chest (1) Pesticides physical holding of the stock amount.
In Fig. 2, the principle that called putting-into-type liquid level meter is directly proportional to this liquid height based on surveyed fluid pressure, when called putting-into-type liquid level meter is arranged on medicine-chest (1) bottom, called putting-into-type liquid level meter is met the pressure that liquid level receives and is: P=ρ .g.h+P
0,
In formula:
P: transmitter meets liquid level pressure
ρ: fluid to be measured density
G: local gravitational acceleration
Po: atmospheric pressure on liquid level
H: transmitter drops into the degree of depth of liquid
Simultaneously, by air guide stainless steel, the pressure of liquid is incorporated into the malleation chamber of sensor, again the atmospheric pressure Po on liquid level is connected with the negative pressure cavity of sensor, with the Po at the offset sensor back side, make sensor record pressure to be: P=ρ .g.h, obviously, by measuring pressure P, the liquid level degree of depth can be obtained.
In Fig. 3, for liquid level gauge Displaying Meter structural representation, the signal of telecommunication of called putting-into-type liquid level meter outputting standard, be input in liquid level gauge Displaying Meter, according in medicine-chest (1), the change of agricultural chemicals height, the numerical value that charactron (10) shows also changes thereupon, the speed travelled at certain tractor and in the time, operator is according to the change of the fountain height of agricultural chemicals, and whether clear agricultural chemicals of analyzing sprays evenly.During operation, in the light on and off reminding medical kit (1) of 8 LED, the height of liquid, when 8 LED all light, operator without the need to supplementary agricultural chemicals, when only lighting 1 LED, liquid level gauge Displaying Meter can be reported to the police and be reminded operator to need to supplement agricultural chemicals in time, avoids unloaded operation.
In Fig. 4, liquid level gauge Displaying Meter circuit diagram, the principle that liquid level sensor is directly proportional to liquid height based on the static pressure of surveyed liquid, is converted to standard electric signal (4-20mA) by static pressure.And the signal of telecommunication after conversion is input to single-chip microcomputer, because STC12C5412AD inside carries AD conversion, single-chip microcomputer can convert the signal of telecommunication of liquid level sensor input to the form of digital quantity by AD process, and by the digital output after conversion to numeral method and 74HC595 latches.The signal received can export, due to its external 8 LED, so can embody the height of medicine-chest (1) agricultural chemicals by the light on and off number of LED by 74HC595.
Pass between the area of pressure-sensitive diaphragm and water density is:
S＝-0.0783ρ
2-1.2391ρ
S is pressure-sensitive diaphragm area, unit cm
2, S=π R
2, R pressure-sensitive diaphragm radius is 0.5≤ρ≤14.
Through detailed research and experiment, find the utility model device matching relationship the best between sensor and circuit under this condition, certainty of measurement can reach in 0.2cm error band.
Claims (6)
1. sprayer electronic level display system, comprise called putting-into-type liquid level meter (2), military anticorrosion air guide cable (3), liquid level gauge Displaying Meter (4), accumulator (5), it is characterized in that: called putting-into-type liquid level meter is arranged on slotted eye place bottom medicine-chest, throw-in type liquid level sensor probe segment is arranged on medicine-chest inside, throw-in type liquid level sensor is arranged on the outside of test container by resistance to compression joint and military anticorrosion air guide cable, military anticorrosion air guide cable is connected with liquid level gauge Displaying Meter, and liquid level gauge Displaying Meter is also connected with accumulator.
2. sprayer electronic level display system according to claim 1, it is characterized in that: described called putting-into-type liquid level meter is made up of resistance to compression joint (6), ceramic capacitive pressure sensitive sensor (7), pressure-sensitive diaphragm (8) and stainless steel cylinder core (9), pressure-sensitive diaphragm, ceramic capacitive pressure sensitive sensor are encapsulated in stainless steel cylinder core inner by resistance to compression joint, sensor diaphragm is arranged on the top of stainless steel cylinder core, and ceramic capacitive pressure sensitive sensor is connected with liquid level gauge Displaying Meter by military anticorrosion air guide cable.
3. sprayer electronic level display system according to claim 1, described liquid level gauge Displaying Meter is made up of electronic device, it is characterized in that:
3A electric current output buck switching mode integrated stable voltage circuit LM2576 first pin connects 12V positive source and the first electric capacity (C1), the other end ground connection of the first electric capacity respectively;
3rd pin of 3A electric current output buck switching mode integrated stable voltage circuit LM2576 and the 5th pin ground connection;
Second pin of 3A electric current output buck switching mode integrated stable voltage circuit LM2576 connects Schottky diode (D1) positive pole and the first inductance, the minus earth of Schottky diode respectively;
4th pin of 3A electric current output buck switching mode integrated stable voltage circuit LM2576 connects the 20 pin of the other end of the first inductance, one end of the second electric capacity and single-chip microcomputer STC12C5412AD respectively;
3A electric current output buck switching mode integrated stable voltage circuit LM2576 the 7th, eight, nine, 12 pins connect LED nixie display DPY-4-LED output display data respectively;
First pin of 3A electric current output buck switching mode integrated stable voltage circuit LM2576 connects one end of the 6th electric capacity and the 9th resistance (R1) respectively, and the other end of the 6th electric capacity connects 5V positive source, the other end ground connection of the 9th resistance;
4th pin of 3A electric current output buck switching mode integrated stable voltage circuit LM2576 connects one end of crystal oscillator and one end of the 3rd electric capacity (C3), the other end ground connection of the 3rd electric capacity respectively;
5th pin of 3A electric current output buck switching mode integrated stable voltage circuit LM2576 connects the other end and the 4th electric capacity (C4) of crystal oscillator, the other end ground connection of the 4th electric capacity respectively;
The tenth pin ground connection of 3A electric current output buck switching mode integrated stable voltage circuit LM2576;
Second, third pin of low-power consumption transceiver MAX485 connects the 6th pin of 3A electric current output buck switching mode integrated stable voltage circuit LM2576 respectively;
4th pin of low-power consumption transceiver MAX485 connects the 3rd pin of 3A electric current output buck switching mode integrated stable voltage circuit LM2576;
First pin of low-power consumption transceiver MAX485 connects second pin of 3A electric current output buck switching mode integrated stable voltage circuit LM2576;
The 5th pin ground connection of low-power consumption transceiver MAX485, the 8th pin connects 5V positive polarity;
16 pin of 3A electric current output buck switching mode integrated stable voltage circuit LM2576 connects one end of the 5th electric capacity (C5) and the tenth resistance (R2), the other end ground connection of the 5th electric capacity, the other end of the tenth resistance connects one end of the 11 resistance and the signal input part of liquid level ceramic capacitive pressure sensitive sensor, the other end ground connection of the 11 resistance respectively;
13 and the 8th pin ground connection of shift register 74HC595; The 16 of shift register 74HC595 is connected 5V positive source with the tenth pin;
11 pin of shift register 74HC595 connects the 15 pin of 3A electric current output buck switching mode integrated stable voltage circuit LM2576;
12 pin of shift register 74HC595 connects the 14 pin of 3A electric current output buck switching mode integrated stable voltage circuit LM2576;
14 pin of shift register 74HC595 connects the 13 pin of 3A electric current output buck switching mode integrated stable voltage circuit LM2576;
First to the 7th pin and the 15 pin of shift register 74HC595 are connected one end of the first to the 8th resistance respectively, the other end connecting luminous diode respectively of the first to the 8th resistance, and light emitting diode connects 5V positive source;
Ceramic capacitive pressure sensitive sensor connects 12V positive source.
4. sprayer electronic level display system according to claim 3, it is characterized in that: the first described electric capacity is 100 μ F, second electric capacity is 1000 μ F, and the 3rd electric capacity and the 4th electric capacity are 22pF, and the 5th electric capacity is 0.1 μ F, Schottky diode model is IN5819, crystal oscillator is 12Hz, and the first to the 8th resistance is 82 Ω, and the 9th resistance is 10k Ω, tenth resistance is 10k Ω, and the 11 resistance is 250 Ω.
5. sprayer electronic level display system according to claim 2, it is characterized in that: the pressure of described called putting-into-type liquid level meter test is: P=ρ .g.h, in formula, P is that transmitter meets liquid level pressure, and ρ is fluid to be measured density, and g is local gravitational acceleration; H is the degree of depth that transmitter drops into liquid.
6. sprayer electronic level display system according to claim 2, is characterized in that: the pass between the area of described pressure-sensitive diaphragm and water density is:
S＝-0.0783ρ
2-1.2391ρ
S is pressure-sensitive diaphragm area, unit cm
2, S=π R
2, R pressure-sensitive diaphragm radius is 0.5≤ρ≤14.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521018713.7U CN205196813U (en) | 2015-12-09 | 2015-12-09 | Sprayer electron liquid level switches system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521018713.7U CN205196813U (en) | 2015-12-09 | 2015-12-09 | Sprayer electron liquid level switches system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205196813U true CN205196813U (en) | 2016-05-04 |
Family
ID=55834576
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201521018713.7U Expired - Fee Related CN205196813U (en) | 2015-12-09 | 2015-12-09 | Sprayer electron liquid level switches system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205196813U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105831051A (en) * | 2015-12-09 | 2016-08-10 | 东北农业大学 | Electronic liquid-level displaying system of sprayer |
| CN107041354A (en) * | 2017-06-06 | 2017-08-15 | 张传开 | A kind of novel sprayer |
-
2015
- 2015-12-09 CN CN201521018713.7U patent/CN205196813U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105831051A (en) * | 2015-12-09 | 2016-08-10 | 东北农业大学 | Electronic liquid-level displaying system of sprayer |
| CN107041354A (en) * | 2017-06-06 | 2017-08-15 | 张传开 | A kind of novel sprayer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| 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: 20160504 Termination date: 20181209 |