CN105843290A - Accurate refrigeration type high-precision automatic temperature control system for greenhouse - Google Patents
Accurate refrigeration type high-precision automatic temperature control system for greenhouse Download PDFInfo
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- CN105843290A CN105843290A CN201610351988.5A CN201610351988A CN105843290A CN 105843290 A CN105843290 A CN 105843290A CN 201610351988 A CN201610351988 A CN 201610351988A CN 105843290 A CN105843290 A CN 105843290A
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D23/00—Control of temperature
- G05D23/19—Control of temperature characterised by the use of electric means
- G05D23/30—Automatic controllers with an auxiliary heating device affecting the sensing element, e.g. for anticipating change of temperature
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G9/00—Cultivation in receptacles, forcing-frames or greenhouses; Edging for beds, lawn or the like
- A01G9/24—Devices or systems for heating, ventilating, regulating temperature, illuminating, or watering, in greenhouses, forcing-frames, or the like
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
- Y02A40/10—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in agriculture
- Y02A40/25—Greenhouse technology, e.g. cooling systems therefor
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- Life Sciences & Earth Sciences (AREA)
- Environmental Sciences (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Amplifiers (AREA)
Abstract
The invention discloses an accurate refrigeration type high-precision automatic temperature control system for a greenhouse. The system is characterized in that the system mainly consists of a micro controller, an electric heater, a refrigerator driving circuit, a display device, an adjustable low-pass filter circuit, a storage device, a signal conversion circuit connected with the adjustable low-pass filter circuit, a temperature sensor group connected with the signal conversion circuit, and a refrigerator connected with the refrigerator driving circuit, wherein the electric heater, the refrigerator driving circuit, the display device, the adjustable low-pass filter circuit, and the storage device are connected with the micro controller. According to the invention, a temperature in a greenhouse can be collected in real time; when the temperature in the greenhouse is too high or too low, the refrigerator or the electric heater can be turned on automatically, so that the temperature can be adjusted timely and accurately and thus the intelligent temperature collection and temperature control can be realized and the good condition can be provided for crop growth. Meanwhile, the automation degree is high and thus the labor force is saved. The refrigerator driving circuit drives the refrigerator, thereby improving working stability of the refrigerator and realizing a good refrigeration effect.
Description
Technical field
The present invention relates to automation control area, specifically refer to a kind of warmhouse booth accurate refrigeration-type high accuracy
Automatic temperature control system.
Background technology
The growth of crops is closely bound up with temperature, and the most a lot of vegetables all use warmhouse booth to plant, for
For warmhouse booth, a most important management factors is temperature control, and temperature is the lowest, and vegetable will be frozen
Dead or stop growing, the too high growth being also unfavorable for vegetable of temperature, so need during growing vegetables
Greenhouse temperature is controlled all the time in the range of applicable vegetable growth.But, the temperature of current warmhouse booth
Controlling to rely primarily on and be manually controlled, this temperature-controlled process not only expends a large amount of manpower, and easily
There is mistake.
Summary of the invention
It is an object of the invention to overcome traditional warmhouse booth temperature to rely on Artificial Control, not only expend a large amount of
Manpower, and be susceptible to the defect of mistake, it is provided that a kind of warmhouse booth is with accurate refrigeration-type high-precision temperature
Automatic control system.
The purpose of the present invention is achieved through the following technical solutions: a kind of warmhouse booth accurate refrigeration-type high accuracy
Automatic temperature control system, mainly by microcontroller, the electric heater that is connected with microcontroller respectively, refrigeration
Drive circuit, display, adjustable lowpass filter circuit, bin, be connected with adjustable lowpass filter circuit
The signaling conversion circuit connect, the sets of temperature sensors being connected with signaling conversion circuit, and drive with refrigeration machine
The refrigeration machine composition that galvanic electricity road is connected.
Further, described refrigeration machine drive circuit, by amplifier P3, amplifier P4, amplifier P5, is put
Big device P6, audion VT7, audion VT8, audion VT9, the positive pole phase of one end and amplifier P3
The resistance R18 that connection, the other end are then connected with microcontroller, is serially connected in positive pole and the output of amplifier P3
Resistance R21 between end, one end is connected with the negative pole of amplifier P3, the other end is defeated with amplifier P4's
Going out the resistance R19 of ground connection while end is connected, plus earth, negative pole then positive pole with amplifier P4 is connected
The electric capacity C15 connect, the resistance R20, N being serially connected between the negative pole of amplifier P3 and the positive pole of electric capacity C15
Pole colelctor electrode with audion VT8 after electric capacity C18 is connected, P pole then after resistance R22 with amplifier
The diode D11 that the outfan of P3 is connected, is serially connected in colelctor electrode and the diode D11 of audion VT7
P pole between resistance R26, one end is connected with the negative pole of amplifier P6, the other end then with audion
The base stage of VT8 be connected while the resistance R25 of ground connection, be serially connected in the positive pole of amplifier P6 and outfan it
Between resistance R24, positive pole is connected with the emitter stage of audion VT7, the negative pole phase of negative pole and amplifier P4
Electric capacity C17, the resistance R23 being serially connected between the negative pole of amplifier P5 and the positive pole of amplifier P6 connected,
And positive pole is connected with the P pole of diode D11, negative pole after inductance L1 with the negative pole phase of amplifier P4
The electric capacity C16 composition of ground connection while connection；The positive pole of described amplifier P5 is connected with the negative pole of electric capacity C16
Connect, its outfan then base stage with audion VT7 is connected；The colelctor electrode of described audion VT7 and two poles
The P pole of pipe D11 is connected；The grounded collector of described audion VT9, its emitter stage and audion VT8
Emitter stage be connected, its base stage then base stage with audion VT8 is connected；The base of described audion VT8
Pole is connected with the outfan of amplifier P6, its colelctor electrode then P pole with diode D11 is collectively forming this system
The outfan of cold drive circuit is also connected with refrigeration machine.
Described adjustable lowpass filter circuit is by audion VT5, audion VT6, field effect transistor MOS, negative pole
Be connected with the base stage of audion VT5, electric capacity C10 that positive pole is connected with the outfan of signaling conversion circuit,
It is serially connected in the source of the resistance R11 between base stage and the colelctor electrode of audion VT5, positive pole and field effect transistor MOS
Electric capacity C14, the N pole that pole is connected, negative pole emitter stage with audion VT5 after resistance R12 is connected
Be connected with 9V voltage, diode that P pole colelctor electrode with audion VT5 after resistance R13 is connected
D8, N pole is connected with the negative pole of electric capacity C14, P pole after potentiometer R15 with the N pole of diode D8
The diode D9 being connected, positive pole is connected with the colelctor electrode of audion VT5, negative pole then with diode D9
Electric capacity C11, the N pole that is connected, P pole be connected with the negative pole of electric capacity C11, P pole and audion VT6
The diode D10 that is connected of base stage, positive pole P pole with diode D8 after resistance R14 is connected, negative
The electric capacity C13 that pole is then connected with microcontroller, positive pole is connected with the positive pole of electric capacity C13, negative pole then with
The electric capacity C12 that the colelctor electrode of audion VT6 is connected, is serially connected in emitter stage and the electric capacity of audion VT6
Resistance R16 between the negative pole of C14, and it is serially connected in the negative pole of electric capacity C13 and the leakage of field effect transistor MOS
Resistance R17 composition between pole；The P pole of described diode D8 is connected with the base stage of audion VT5；
The described emitter stage of audion VT6 is connected with the grid of field effect transistor MOS；Described electric capacity C14's is negative
Pole ground connection.
Described signaling conversion circuit is by amplifying circuit of analog signal, the height being connected with amplifying circuit of analog signal
Effect change-over circuit composition；The input of described amplifying circuit of analog signal is connected with sets of temperature sensors, should
Efficiently the outfan of change-over circuit then input with adjustable lowpass filter circuit is connected.
Described amplifying circuit of analog signal is by amplifier P1, amplifier P2, and audion VT1, N pole is through resistance
The diode D1 that after R1, the positive pole with amplifier P1 is connected, P pole is connected with sets of temperature sensors；Negative
The electric capacity C1, N that pole is connected with the positive pole of amplifier P1, positive pole is connected with the outfan of amplifier P1
Pole outfan with amplifier P2 after resistance R4 is connected, P pole is connected with the base stage of audion VT1
Diode D3, negative pole is connected with the positive pole of amplifier P2, positive pole is connected with the outfan of amplifier P2
Electric capacity C2, the N pole connect is connected with the negative pole of amplifier P2, the Zener diode D2 of P pole ground connection, with
The resistance R3 that Zener diode D2 is in parallel, and it is serially connected in negative pole and the Zener diode of amplifier P1
Resistance R2 composition between the P pole of D2；The emitter stage of described audion VT1 and the positive pole of amplifier P1
Be connected, its colelctor electrode is connected with the outfan of amplifier P1；The N pole of described diode D3 is with efficient
Change-over circuit is connected；The outfan of described amplifier P2 is connected with efficient change-over circuit, its positive pole with put
The outfan of big device P1 is connected.
Described efficient change-over circuit by conversion chip U, audion VT2, audion VT3, audion VT4,
Positive pole is connected with the SS pin of conversion chip U, negative pole after resistance R5 with the colelctor electrode of audion VT2
Electric capacity C3, the N pole being connected is connected with the GND pin of conversion chip U, the voltage stabilizing two of P pole ground connection
Pole pipe D4, positive pole is connected with the VREF pin of conversion chip U, the N of negative pole and Zener diode D4
The electric capacity C6 that pole is connected, positive pole is connected with the P pole of Zener diode D4, negative pole after resistance R6 with
The electric capacity C5 that the negative pole of electric capacity C6 is connected, positive pole is connected with the positive pole of electric capacity C5, negative pole and electric capacity
The electric capacity C4 that the negative pole of C6 is connected, positive pole emitter stage with audion VT3 after resistance R8 is connected,
The electric capacity C7 that negative pole is connected with the negative pole of electric capacity C6, the resistance R7 being in parallel with electric capacity C7, positive pole with
The electric capacity C8 that the N pole of diode D3 is connected, negative pole is connected with the V+ pin of conversion chip U, string
Resistance R9, the N pole being connected between the positive pole of electric capacity C8 and the colelctor electrode of audion VT3 and audion VT4
Diode D5, the P pole that base stage is connected, P pole is connected with the emitter stage of audion VT3 through inductance L
Afterwards the emitter stage with audion VT4 be connected, N pole after electric capacity C9 with the emitter stage phase of audion VT3
Diode D6, the P pole connected is connected with the emitter stage of audion VT3, the positive pole of N pole and electric capacity C10
The diode D7 being connected, and one end is connected with the N pole of diode D7, the resistance of other end ground connection
R10 forms；The SHDN pin of described conversion chip U is connected with the outfan of amplifier P2, its V-
Pin then positive pole with electric capacity C7 is connected, its LX pin then base stage with audion VT3 is connected；Institute
State the grounded emitter of audion VT2, its base stage is connected with the P pole of Zener diode D4；Described three
The colelctor electrode of pole pipe VT4 is connected with the positive pole of electric capacity C8.
Described conversion chip U is the integrated chip of MAX752.
The present invention compared with the prior art, has the following advantages and beneficial effect:
(1) present invention can be real-time gathers the temperature in booth, when too high or too low for temperature in booth
Can automatically start refrigeration machine or electric heater such that it is able to temperature being adjusted promptly and accurately, it is achieved temperature
Degree gathers and temperature controlled intellectuality, provides good condition for crop growth；Simultaneously the present invention from
Dynamicization degree is high, can save labour force.
(2) the interference signal in digital signal can be filtered by the adjustable lowpass filter circuit of the present invention,
Avoid interference the effect of signals present invention accuracy of detection to canopy temperature, thus cause electric heater and refrigeration
The Wrong control of machine.
(3) refrigeration machine is driven by the present invention by refrigeration machine drive circuit, thus improves refrigeration machine work
Stability, to reach more preferable refrigeration.
Accompanying drawing explanation
Fig. 1 is the overall structure schematic diagram of the present invention.
Fig. 2 is the structural representation of the signaling conversion circuit of the present invention.
Fig. 3 is the structural representation of the adjustable lowpass filter circuit of the present invention.
Fig. 4 is the structural representation of the refrigeration machine drive circuit of the present invention.
Detailed description of the invention
Below in conjunction with embodiment, the present invention is described in further detail, but embodiments of the present invention are not
It is limited to this.
Embodiment
As it is shown in figure 1, the warmhouse booth of the present invention is with accurate refrigeration-type high-precision temperature automatic control system,
Mainly by microcontroller, electric heater, refrigeration machine, refrigeration machine drive circuit, display, signaling conversion circuit,
Adjustable lowpass filter circuit, bin and sets of temperature sensors 9 part composition.
Wherein, microcontroller is the control centre of the present invention, and its preferred MCS-51 single-chip microcomputer realizes.Should
Sets of temperature sensors includes that multiple temperature sensor, each temperature sensor are evenly distributed in booth, as
This can detect the temperature in booth, this temperature sensor preferred Shanghai Ke Qi finite instrument company more accurately
The SMW temperature sensor produced realizes.This signaling conversion circuit is for the signal to temperature sensor output
Being converted to digital signal, its input is connected with the signal output part of temperature sensor, its outfan then with
The input of adjustable lowpass filter circuit is connected.This adjustable lowpass filter circuit is in digital signal
Interference signal filters, and its outfan is connected with the P1.0 pin of MCS-51 single-chip microcomputer.This bin
For storing the optimum temperature range value of crop growth in advance, its P1.1 pin with MCS-51 single-chip microcomputer
It is connected.This refrigeration machine drive circuit is used for driving refrigeration machine to work, its input and MCS-51 single-chip microcomputer
P0.2 pin be connected, its outfan is then connected with refrigeration machine.This display then with MCS-51 monolithic
The P0.3 pin of machine is connected；Electric heater is then connected with the P0.1 pin of MCS-51 single-chip microcomputer.
Described signaling conversion circuit can be converted to the analogue signal of temperature sensor output efficiently
The digital signal that MCS-51 single-chip microcomputer can identify, its structure as in figure 2 it is shown, by amplifying circuit of analog signal,
The efficient change-over circuit composition being connected with amplifying circuit of analog signal.Described amplifying circuit of analog signal defeated
Enter end be connected with sets of temperature sensors, the outfan of this efficient change-over circuit then with MCS-51 single-chip microcomputer phase
Connect.
Wherein, described amplifying circuit of analog signal is by amplifier P1, amplifier P2, audion VT1, resistance
R1, resistance R2, resistance R3, resistance R4, diode D1, diode D3, Zener diode D2, electricity
Hold C1 and electric capacity C2 composition.
During connection, the N pole of diode D1 positive pole with amplifier P1 after resistance R1 is connected, its P
Pole is connected with sets of temperature sensors.The negative pole of electric capacity C1 is connected with the positive pole of amplifier P1, its positive pole
It is connected with the outfan of amplifier P1.The N pole of diode D3 defeated with amplifier P2 after resistance R4
Go out end be connected, its P pole is connected with the base stage of audion VT1.The negative pole of electric capacity C2 and amplifier P2
Positive pole be connected, its positive pole is connected with the outfan of amplifier P2.The N pole of Zener diode D2 with
The negative pole of amplifier P2 is connected, its P pole ground connection.Resistance R3 is in parallel with Zener diode D2.Electricity
Resistance R2 is then serially connected between the negative pole of amplifier P1 and the P pole of Zener diode D2.
The emitter stage of described audion VT1 is connected with the positive pole of amplifier P1, its colelctor electrode and amplifier
The outfan of P1 is connected.The N pole of described diode D3 is connected with efficient change-over circuit.Described amplification
The outfan of device P2 is connected with efficient change-over circuit, its positive pole is connected with the outfan of amplifier P1.
The analogue signal of temperature sensor output is the faintest, and analogue signal then can be entered by this amplifying circuit of analog signal
The distortionless amplification of row, in order to efficiently change-over circuit processes.
It addition, described efficient change-over circuit can be converted to digital signal analogue signal is sent to adjustable lowpass
Filter circuit, it is by conversion chip U, audion VT2, audion VT3, audion VT4, resistance R5,
Resistance R6, resistance R7, resistance R8, resistance R9, resistance R10, electric capacity C3, electric capacity C4, electric capacity C5,
Electric capacity C6, electric capacity C7, electric capacity C8, electric capacity C9, Zener diode D4, diode D5, diode
D6 and diode D7 composition.
During connection, the positive pole of electric capacity C3 is connected with the SS pin of conversion chip U, its negative pole is through resistance
After R5, the colelctor electrode with audion VT2 is connected.The N pole of Zener diode D4 is with conversion chip U's
GND pin is connected, its P pole ground connection.The VREF pin phase of the positive pole of electric capacity C6 and conversion chip U
Connect, its negative pole is connected with the N pole of Zener diode D4.The positive pole of electric capacity C5 and Zener diode
The P pole of D4 is connected, its negative pole negative pole with electric capacity C6 after resistance R6 is connected.Electric capacity C4 is just
Pole is connected with the positive pole of electric capacity C5, its negative pole is connected with the negative pole of electric capacity C6.The positive pole of electric capacity C7
After resistance R8, the emitter stage with audion VT3 is connected, its negative pole is connected with the negative pole of electric capacity C6.
Resistance R7 is in parallel with electric capacity C7.The positive pole of electric capacity C8 is connected with the N pole of diode D3, it is born
Pole is connected with the V+ pin of conversion chip U.Resistance R9 is serially connected in positive pole and the audion VT3 of electric capacity C8
Colelctor electrode between.The N pole of diode D5 is connected with the base stage of audion VT4, its P pole and three poles
The emitter stage of pipe VT3 is connected.The P pole of diode D6 after inductance L with the emitter stage of audion VT4
Be connected, its N pole is connected with the positive pole of electric capacity C9.The negative pole of described electric capacity C9 and audion VT3
Emitter stage be connected.The P pole of diode D7 is connected with the emitter stage of audion VT3, its N pole with
The input of adjustable lowpass filter circuit is connected.One end of resistance R10 is extremely connected with the N of diode D7
Connect, its other end ground connection.
Meanwhile, the SHDN pin of described conversion chip U be connected with the outfan of amplifier P2, its V-
Pin then positive pole with electric capacity C7 is connected, its LX pin then base stage with audion VT3 is connected.Institute
State the grounded emitter of audion VT2, its base stage is connected with the P pole of Zener diode D4.Described three
The colelctor electrode of pole pipe VT4 is connected with the positive pole of electric capacity C8.In order to preferably implement the present invention, described turn
Change the chip U integrated chip of preferred MAX752 to realize.
As it is shown on figure 3, adjustable lowpass filter circuit is by audion VT5, audion VT6, field effect transistor MOS,
Resistance R11, resistance R12, resistance R13, resistance R14, potentiometer R15, resistance R16, resistance R17,
Diode D8, diode D9, diode D10, electric capacity C10, electric capacity C11, electric capacity C12, electric capacity
C13 and electric capacity C14 composition.
During connection, the negative pole of electric capacity C10 is connected with the base stage of audion VT5, its positive pole and diode
The N pole of D7 is connected.Resistance R11 is serially connected between base stage and the colelctor electrode of audion VT5.Electric capacity C14
Positive pole be connected with the source electrode of field effect transistor MOS, its negative pole after resistance R12 with audion VT5's
Emitter stage is connected.The N pole of diode D8 is connected with 9V voltage, its P pole after resistance R13 with three
The colelctor electrode of pole pipe VT5 is connected.The N pole of diode D9 is connected with the negative pole of electric capacity C14, its P
N pole with diode D8 after potentiometer R15, pole is connected.The positive pole of electric capacity C11 and audion VT5
Colelctor electrode be connected, its negative pole is then connected with the P pole of diode D9.The N pole of diode D10 with
The negative pole of electric capacity C11 is connected, its P pole is connected with the base stage of audion VT6.The positive pole of electric capacity C13
After resistance R14 the P pole with diode D8 be connected, its negative pole then with the P1.0 of MCS-51 single-chip microcomputer
Pin is connected.The positive pole of electric capacity C12 is connected with the positive pole of electric capacity C13, its negative pole then with audion VT6
Colelctor electrode be connected.Resistance R16 is serially connected between the emitter stage of audion VT6 and the negative pole of electric capacity C14.
Resistance R17 is serially connected between negative pole and the drain electrode of field effect transistor MOS of electric capacity C13.Described diode D8
P pole be connected with the base stage of audion VT5.The emitter stage of described audion VT6 and field effect transistor MOS
Grid be connected；The minus earth of described electric capacity C14.
Interference signal in digital signal can be filtered by this adjustable lowpass filter circuit, it is to avoid interference letter
Number affect the present invention accuracy of detection to canopy temperature, thus cause the mistake control to electric heater and refrigeration machine
System.
This refrigeration machine drive circuit can be stable driving refrigeration machine work, to improve the refrigeration of refrigeration machine,
As shown in Figure 4, it is by amplifier P3, amplifier P4, amplifier P5, amplifier P6, three poles for its structure
Pipe VT7, audion VT8, audion VT9, one end is connected with the positive pole of amplifier P3, the other end then
The resistance R18 being connected with the P0.2 pin of MCS-51 single-chip microcomputer, is serially connected in the positive pole of amplifier P3 and defeated
Going out the resistance R21 between end, one end is connected with the negative pole of amplifier P3, the other end and amplifier P4
Outfan be connected while the resistance R19 of ground connection, plus earth, negative pole then with the positive pole phase of amplifier P4
Electric capacity C15, the resistance R20 being serially connected between the negative pole of amplifier P3 and the positive pole of electric capacity C15 connected,
N pole colelctor electrode with audion VT8 after electric capacity C18 is connected, P pole then after resistance R22 with amplification
The diode D11 that the outfan of device P3 is connected, is serially connected in colelctor electrode and the diode D11 of audion VT7
P pole between resistance R26, one end is connected with the negative pole of amplifier P6, the other end then with audion
The base stage of VT8 be connected while the resistance R25 of ground connection, be serially connected in the positive pole of amplifier P6 and outfan it
Between resistance R24, positive pole is connected with the emitter stage of audion VT7, the negative pole phase of negative pole and amplifier P4
Electric capacity C17, the resistance R23 being serially connected between the negative pole of amplifier P5 and the positive pole of amplifier P6 connected,
And positive pole is connected with the P pole of diode D11, negative pole after inductance L1 with the negative pole phase of amplifier P4
The electric capacity C16 composition of ground connection while connection.
The positive pole of described amplifier P5 is connected with the negative pole of electric capacity C16, its outfan then with audion VT7
Base stage be connected.The colelctor electrode of described audion VT7 is connected with the P pole of diode D11.Described three
The grounded collector of pole pipe VT9, its emitter stage are connected with the emitter stage of audion VT8, its base stage then with
The base stage of audion VT8 is connected.The base stage of described audion VT8 is connected with the outfan of amplifier P6
Connect, its colelctor electrode then P pole with diode D11 be collectively forming this refrigeration machine drive circuit outfan and with
Refrigeration machine is connected.
Wherein, amplifier P3, resistance R18, resistance R21 and resistance R22 form a comparison circuit；
Electric capacity C16, inductance L1, amplifier P4, electric capacity C15, resistance R20 and resistance R19 then form one
Voltage follower circuit.This voltage follower circuit plays negative feedback, the signal feedback of its comparison circuit output
Returning the input of comparison circuit, comparison circuit is compared input signal, thus is adjusted it with feedback signal
Output voltage so that it is output voltage keeps stable.
During work, temperature signal in sets of temperature sensors Real-time Collection booth is also transferred to signaling conversion circuit,
The analogue signal that signaling conversion circuit exports temperature sensor is transferred to adjustable lowpass after being converted to digital signal
Filter circuit, this adjustable lowpass filter circuit is sent to micro-after filtering the interference signal in digital signal
Controller, microcontroller is the temperature value collected and the Optimal Temperature value scope having previously been stored in bin
Contrasting, when the temperature in booth is higher than preset value, microcontroller sends instructions to refrigeration machine drive circuit,
Refrigeration machine is driven to work to the air cooling-down in booth, until canopy temperature is in by refrigeration machine drive circuit
In the temperature range value preset；When the temperature in booth is less than the temperature value pre-set, microcontroller is then
Drive electric heater work to heating in booth until canopy temperature is in default temperature range value；
When the temperature value in booth is in temperature range in advance, electric heater and refrigeration machine do not work.This shows simultaneously
Show the real-time temperature values in device display booth.
As it has been described above, just can well realize the present invention.
Claims (7)
1. a warmhouse booth is with accurate refrigeration-type high-precision temperature automatic control system, it is characterised in that main
Will by microcontroller, the electric heater that is connected with microcontroller respectively, refrigeration machine drive circuit, display,
Adjustable lowpass filter circuit, bin, the signaling conversion circuit being connected with adjustable lowpass filter circuit, with
The sets of temperature sensors that signaling conversion circuit is connected, and the refrigeration machine being connected with refrigeration machine drive circuit
Composition.
A kind of warmhouse booth the most according to claim 1 automatically controls with accurate refrigeration-type high-precision temperature
System, it is characterised in that: described refrigeration machine drive circuit by amplifier P3, amplifier P4, amplifier P5,
The positive pole of amplifier P6, audion VT7, audion VT8, audion VT9, one end and amplifier P3
Be connected, resistance R18 that the other end is then connected with microcontroller, be serially connected in the positive pole of amplifier P3 and defeated
Going out the resistance R21 between end, one end is connected with the negative pole of amplifier P3, the other end and amplifier P4
Outfan be connected while the resistance R19 of ground connection, plus earth, negative pole then with the positive pole phase of amplifier P4
Electric capacity C15, the resistance R20 being serially connected between the negative pole of amplifier P3 and the positive pole of electric capacity C15 connected,
N pole colelctor electrode with audion VT8 after electric capacity C18 is connected, P pole then after resistance R22 with amplification
The diode D11 that the outfan of device P3 is connected, is serially connected in colelctor electrode and the diode D11 of audion VT7
P pole between resistance R26, one end is connected with the negative pole of amplifier P6, the other end then with audion
The base stage of VT8 be connected while the resistance R25 of ground connection, be serially connected in the positive pole of amplifier P6 and outfan it
Between resistance R24, positive pole is connected with the emitter stage of audion VT7, the negative pole phase of negative pole and amplifier P4
Electric capacity C17, the resistance R23 being serially connected between the negative pole of amplifier P5 and the positive pole of amplifier P6 connected,
And positive pole is connected with the P pole of diode D11, negative pole after inductance L1 with the negative pole phase of amplifier P4
The electric capacity C16 composition of ground connection while connection；The positive pole of described amplifier P5 is connected with the negative pole of electric capacity C16
Connect, its outfan then base stage with audion VT7 is connected；The colelctor electrode of described audion VT7 and two poles
The P pole of pipe D11 is connected；The grounded collector of described audion VT9, its emitter stage and audion VT8
Emitter stage be connected, its base stage then base stage with audion VT8 is connected；The base of described audion VT8
Pole is connected with the outfan of amplifier P6, its colelctor electrode then P pole with diode D11 is collectively forming this system
The outfan of cold drive circuit is also connected with refrigeration machine.
A kind of warmhouse booth the most according to claim 2 automatically controls with accurate refrigeration-type high-precision temperature
System, it is characterised in that: described adjustable lowpass filter circuit is imitated by audion VT5, audion VT6, field
Should pipe MOS, negative pole is connected with the base stage of audion VT5, the outfan phase of positive pole and signaling conversion circuit
The electric capacity C10 connected, is serially connected in the resistance R11 between base stage and the colelctor electrode of audion VT5, positive pole with
The source electrode of field effect transistor MOS is connected, negative pole emitter stage with audion VT5 after resistance R12 is connected
Electric capacity C14, the N pole connect is connected with 9V voltage, P pole after resistance R13 with the current collection of audion VT5
Diode D8, the N pole that pole is connected is connected with the negative pole of electric capacity C14, P pole after potentiometer R15 with
The diode D9 that the N pole of diode D8 is connected, positive pole is connected with the colelctor electrode of audion VT5, bears
Electric capacity C11, the N pole that pole is then connected with the P pole of diode D9 is connected with the negative pole of electric capacity C11, P
The diode D10 that pole is connected with the base stage of audion VT6, positive pole after resistance R14 with diode D8
The electric capacity C13 that P pole is connected, negative pole is then connected with microcontroller, the positive pole of positive pole and electric capacity C13
Be connected, electric capacity C12 that negative pole then colelctor electrode with audion VT6 is connected, be serially connected in audion VT6
Emitter stage and the negative pole of electric capacity C14 between resistance R16, and be serially connected in negative pole and the field of electric capacity C13
Resistance R17 composition between the drain electrode of effect pipe MOS；The P pole of described diode D8 and audion VT5
Base stage be connected；The described emitter stage of audion VT6 is connected with the grid of field effect transistor MOS；Institute
State the minus earth of electric capacity C14.
A kind of warmhouse booth the most according to claim 3 automatically controls with accurate refrigeration-type high-precision temperature
System, it is characterised in that: described signaling conversion circuit, by amplifying circuit of analog signal, amplifies with analogue signal
The efficient change-over circuit composition that circuit is connected；The input of described amplifying circuit of analog signal and temperature sensing
Device group is connected, and the outfan of this efficient change-over circuit then input with adjustable lowpass filter circuit is connected.
A kind of warmhouse booth the most according to claim 4 automatically controls with accurate refrigeration-type high-precision temperature
System, it is characterised in that: described amplifying circuit of analog signal is by amplifier P1, amplifier P2, audion
VT1, N pole positive pole with amplifier P1 after resistance R1 is connected, P pole is connected with sets of temperature sensors
Diode D1；Negative pole is connected with the positive pole of amplifier P1, positive pole is connected with the outfan of amplifier P1
Electric capacity C1, the N pole connect outfan with amplifier P2 after resistance R4 is connected, P pole and audion VT1
The diode D3 that is connected of base stage, negative pole is connected with the positive pole of amplifier P2, positive pole and amplifier P2
Electric capacity C2, the N pole that is connected of outfan be connected with the negative pole of amplifier P2, the voltage stabilizing two of P pole ground connection
Pole pipe D2, the resistance R3 being in parallel with Zener diode D2, and be serially connected in amplifier P1 negative pole and
Resistance R2 composition between the P pole of Zener diode D2；The emitter stage of described audion VT1 and amplifier
The positive pole of P1 is connected, its colelctor electrode is connected with the outfan of amplifier P1；The N of described diode D3
Pole is connected with efficient change-over circuit；The outfan of described amplifier P2 is connected with efficient change-over circuit, it
Positive pole is connected with the outfan of amplifier P1.
A kind of warmhouse booth the most according to claim 5 automatically controls with accurate refrigeration-type high-precision temperature
System, it is characterised in that: described efficient change-over circuit by conversion chip U, audion VT2, audion VT3,
Audion VT4, positive pole is connected with the SS pin of conversion chip U, negative pole after resistance R5 with audion
Electric capacity C3, the N pole that the colelctor electrode of VT2 is connected is connected with the GND pin of conversion chip U, P pole
The Zener diode D4 of ground connection, positive pole is connected with the VREF pin of conversion chip U, negative pole and voltage stabilizing two
The electric capacity C6 that the N pole of pole pipe D4 is connected, positive pole is connected with the P pole of Zener diode D4, negative pole
The electric capacity C5 that negative pole with electric capacity C6 is connected after resistance R6, positive pole is connected with the positive pole of electric capacity C5,
The electric capacity C4 that negative pole is connected with the negative pole of electric capacity C6, positive pole after resistance R8 with audion VT3 send out
The electric capacity C7 that emitter-base bandgap grading is connected, negative pole is connected with the negative pole of electric capacity C6, the resistance being in parallel with electric capacity C7
R7, the electricity that positive pole is connected with the N pole of diode D3, negative pole is connected with the V+ pin of conversion chip U
Hold C8, resistance R9, the N pole and three being serially connected between the positive pole of electric capacity C8 and the colelctor electrode of audion VT3
Diode D5, the P pole that the base stage of pole pipe VT4 is connected, P pole is connected with the emitter stage of audion VT3
After inductance L the emitter stage with audion VT4 be connected, N pole after electric capacity C9 with audion VT3's
Diode D6, the P pole that emitter stage is connected is connected with the emitter stage of audion VT3, N pole and electric capacity
The diode D7 that the positive pole of C10 is connected, and one end is connected with the N pole of diode D7, the other end
The resistance R10 composition of ground connection；The SHDN pin of described conversion chip U and the outfan phase of amplifier P2
Connect, its V-pin then positive pole with electric capacity C7 is connected, its LX pin then with the base of audion VT3
Pole is connected；The grounded emitter of described audion VT2, the P pole phase of its base stage and Zener diode D4
Connect；The colelctor electrode of described audion VT4 is connected with the positive pole of electric capacity C8.
A kind of warmhouse booth the most according to claim 6 automatically controls with accurate refrigeration-type high-precision temperature
System, it is characterised in that: described conversion chip U is the integrated chip of MAX752.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610351988.5A CN105843290A (en) | 2016-05-24 | 2016-05-24 | Accurate refrigeration type high-precision automatic temperature control system for greenhouse |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610351988.5A CN105843290A (en) | 2016-05-24 | 2016-05-24 | Accurate refrigeration type high-precision automatic temperature control system for greenhouse |
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| CN105843290A true CN105843290A (en) | 2016-08-10 |
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ID=56594356
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610351988.5A Pending CN105843290A (en) | 2016-05-24 | 2016-05-24 | Accurate refrigeration type high-precision automatic temperature control system for greenhouse |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106292791A (en) * | 2016-09-29 | 2017-01-04 | 四川森迪科技发展股份有限公司 | A kind of plant is with low interference temperature automatic control system |
| CN106406381A (en) * | 2016-09-26 | 2017-02-15 | 四川森迪科技发展股份有限公司 | Temperature monitoring and alarming system for greenhouse planting of fig |
| CN106444906A (en) * | 2016-09-26 | 2017-02-22 | 四川森迪科技发展股份有限公司 | Temperature monitoring warning system for greenhouse ficus carica planting based on nonlinear compensation |
| CN106484005A (en) * | 2016-09-29 | 2017-03-08 | 四川森迪科技发展股份有限公司 | A kind of plant's automatic temperature control system based on integrating circuit |
| CN106484007A (en) * | 2016-09-29 | 2017-03-08 | 四川森迪科技发展股份有限公司 | A kind of plant based on integrating circuit is with low interference temperature automatic control system |
| CN106484006A (en) * | 2016-09-29 | 2017-03-08 | 四川森迪科技发展股份有限公司 | A kind of plant automatic temperature control system |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106406381A (en) * | 2016-09-26 | 2017-02-15 | 四川森迪科技发展股份有限公司 | Temperature monitoring and alarming system for greenhouse planting of fig |
| CN106444906A (en) * | 2016-09-26 | 2017-02-22 | 四川森迪科技发展股份有限公司 | Temperature monitoring warning system for greenhouse ficus carica planting based on nonlinear compensation |
| CN106292791A (en) * | 2016-09-29 | 2017-01-04 | 四川森迪科技发展股份有限公司 | A kind of plant is with low interference temperature automatic control system |
| CN106484005A (en) * | 2016-09-29 | 2017-03-08 | 四川森迪科技发展股份有限公司 | A kind of plant's automatic temperature control system based on integrating circuit |
| CN106484007A (en) * | 2016-09-29 | 2017-03-08 | 四川森迪科技发展股份有限公司 | A kind of plant based on integrating circuit is with low interference temperature automatic control system |
| CN106484006A (en) * | 2016-09-29 | 2017-03-08 | 四川森迪科技发展股份有限公司 | A kind of plant automatic temperature control system |
| CN106292791B (en) * | 2016-09-29 | 2018-06-08 | 永春锐拓信息技术中心 | A kind of low interference temperature automatic control system of farm |
| CN106484006B (en) * | 2016-09-29 | 2018-06-08 | 永春锐拓信息技术中心 | A kind of farm's automatic temperature control system |
| CN106484005B (en) * | 2016-09-29 | 2018-06-26 | 福建省永春冠怡花卉苗木专业合作社 | A kind of farm's automatic temperature control system based on integrating circuit |
| CN106484007B (en) * | 2016-09-29 | 2018-06-26 | 福建省永春冠怡花卉苗木专业合作社 | It is a kind of based on the low interference temperature automatic control system of the farm of integrating circuit |
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