CN105900745B - Comprehensive controller and control method for electric film rolling machine of sunlight greenhouse - Google Patents

Comprehensive controller and control method for electric film rolling machine of sunlight greenhouse Download PDF

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Publication number
CN105900745B
CN105900745B CN201610427622.1A CN201610427622A CN105900745B CN 105900745 B CN105900745 B CN 105900745B CN 201610427622 A CN201610427622 A CN 201610427622A CN 105900745 B CN105900745 B CN 105900745B
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double
film rolling
relay
rolling machine
control unit
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CN105900745A (en
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李天华
魏珉
侯加林
李清明
施国英
刘付浩
仲崇哲
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Shandong Agricultural University
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Shandong Agricultural University
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    • 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
    • A01G9/22—Shades or blinds for greenhouses, or the like
    • A01G9/227—Shades or blinds for greenhouses, or the like rolled up during non-use
    • 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
    • A01G9/241—Arrangement of opening or closing systems for windows and ventilation panels
    • 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
    • A01G9/246—Air-conditioning systems
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D27/00—Simultaneous control of variables covered by two or more of main groups G05D1/00 - G05D25/00
    • G05D27/02—Simultaneous control of variables covered by two or more of main groups G05D1/00 - G05D25/00 characterised by the use of electric means
    • 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)
  • Greenhouses (AREA)

Abstract

The invention discloses a sunlight greenhouse electric film rolling machine integrated controller and a control method. The automatic control unit part adopts nixie tube display and combines keys to set parameters, and opens and closes the ventilation opening according to the detection of the temperature and humidity sensor. The remote control unit adopts a wireless remote control module with codes. The manual operation unit adopts a double-pole three-gear switch, and can realize the film rolling, film releasing and stopping operations. The interlocking linkage protection unit ensures that only one control mode of the system is used at any time, and other two unit loops are automatically cut off. The automatic control mode of the invention fully considers the production management experience of users, and the reasonability and scientificity of the film rolling and ventilation are improved by setting the temperature and time parameters. The addition of remote control and manual modes provides more choices for users, and meets the individual requirements of the users in different seasons and different crop growth stages.

Description

Comprehensive controller and control method for electric film rolling machine of sunlight greenhouse
Technical Field
The invention relates to the technical field of agricultural planting machinery, in particular to an integrated controller and a control method of an electric film rolling machine for a sunlight greenhouse, which are particularly suitable for sunlight greenhouse users with different requirements on ventilation film rolling control modes.
Background
Greenhouse ventilation promotes mass-to-mass heat exchange between indoor and outdoor environments, and in greenhouse cultivation, ventilation control is a key problem for controlling cultivation environments, and particularly has important influence on the temperature and humidity of small environments such as greenhouses. The common natural ventilation is realized by opening a skylight (ventilation opening) or a side window and relying on wind pressure or hot pressing action, and the common natural ventilation becomes a preferred mode for regulating and controlling the greenhouse environment because the common natural ventilation is convenient to maintain and does not need to consume extra energy.
With the wide application of technologies such as the internet of things, modern measurement and control and the like, a temperature and humidity monitoring system in the greenhouse, which is formed by various sensors, alarms and the like, continuously appears, and the speed and the precision of the system are greatly improved when each measuring point in the greenhouse is subjected to itinerant detection and regulation. However, these applications are mainly for large multi-span greenhouses and demonstration type sunlight greenhouses, and are influenced by factors such as cost, practicability, reliability and the like, and do not form a popular application in ordinary sunlight greenhouses operated by farmers. For a long time, sunlight greenhouse users still adopt traditional methods such as thermometers and hygrometers to collect temperature and humidity in the greenhouse, ventilation is a main means for cooling and dehumidifying, and the operations are all completed through manual operation. Because the precision of the thermometer and the hygrometer is low, the manual reading is inaccurate, the labor intensity of the manual ventilation and other operations is high, and the production efficiency of the greenhouse is influenced. Therefore, it is necessary to monitor the temperature and humidity in a sunlight greenhouse environment and to realize humiture adjustment based on automatic film rolling.
Through the search of documents in the prior art, the Chinese utility model patent 'sunlight greenhouse temperature and humidity intelligent control system (CN 201320429281.3)' discloses greenhouse temperature and humidity control based on sunlight greenhouse temperature and humidity detection, and does not mention other control modes and strategies. The chinese utility model discloses a "humiture automatic control system for warmhouse booth (CN 201220494362.7)" discloses a warmhouse booth atmospheric control method, has realized roll up curtain machine, roll up membrane machine control based on temperature and humidity measurement, manual and remote control mode, nevertheless the utility model discloses do not realize the control mode based on time point control, more do not have the action when to the different control mode that probably exists and provide the protection, if automatic detection mode corotation, manual mode is just anti, will form the positive negative pole short circuit of power. The chinese utility model "an intelligent control cabinet for sunlight greenhouse (cn201320293268. x)" discloses an intelligent control cabinet for sunlight greenhouse, can realize the control to rolling up curtain machine, rolling up machine and solenoid valve according to soil moisture and air temperature and humidity, and too much detection and drive arrangement have improved the cost of system, make it not be applicable to only have the sunlight greenhouse that requires to ventilation control.
The prior published technologies do not fully consider the sensitive factor of cost control in the application of the common sunlight greenhouse, can not meet the diversified operation requirements of farmers on different production conditions, and have certain defects in the aspect of reliability design, thereby influencing the popularization and application of the technologies in the film rolling and ventilation of the sunlight greenhouse.
Disclosure of Invention
Aiming at the problems of the sunlight greenhouse ventilation control system in use and popularization, the invention provides the greenhouse electric film rolling machine integrated controller and the control method, aiming at better reducing the production cost of users of the sunlight greenhouse, meeting the requirements of the users on multiple operation modes, simultaneously improving the working reliability of the system and improving the temperature and humidity environment of the sunlight greenhouse.
In order to achieve the purpose, the invention adopts the following technical scheme:
an integrated controller of an electric film rolling machine for a greenhouse comprises an automatic control unit, a remote control unit, a manual operation unit and an interlocking linkage protection unit; the output ends of the automatic control unit, the remote control unit and the manual operation unit are connected with the electric film rolling machine under the control of the interlocking linkage protection unit;
the automatic control unit is formed by an upper layer circuit board and a lower layer circuit board, wherein the two circuit boards are formed by inserting a pin header and a pin header, and comprises a processor, and a sensor, a memory, an input key, a display and two output relays are connected with the processor;
the remote control unit adopts a wireless remote control module with codes and is provided with two relays;
the interlocking linkage protection unit comprises four double-pole double-throw intermediate relays; the four double-pole double-throw intermediate relays are independently arranged, each relay is matched with one fly-wheel diode to form a control circuit, and each double-pole double-throw intermediate relay is provided with two corresponding output ends;
the output end of the interlocking linkage protection unit is provided with a switch circuit, the switch circuit comprises two paths, one path is connected with one output end of four double-pole double-throw intermediate relays in series through a direct-current power supply and then is connected with a manual switch in series and then is connected with two connecting ends of an electric film rolling machine; the other output end of the double-pole double-throw intermediate relay is respectively connected with two connecting ends of the electric film rolling machine;
the two output relays of the automatic control unit and the two output relays of the remote control unit respectively correspond to and control the four double-pole double-throw intermediate relays;
when the film needs to be rolled or released, the relay of the remote control module or the automatic control unit is used for switching on the double-pole double-throw intermediate relay coil in the interlocking linkage protection unit, the normally open contact of the double-pole double-throw intermediate relay is closed, and the electric film rolling machine is electrified to rotate forwards or reversely.
Preferably, the display adopts a six-bit LED nixie tube and is used for displaying a temperature value and a humidity value, displaying a set value under a temperature and humidity setting condition, and displaying the time, minute and second which are being set when time is set; the six-digit nixie tube is divided into an upper group and a lower group, each group has three digits, the upper group displays temperature, and the lower group displays humidity; two of the four light-emitting diodes are used for unit backlight indication of temperature and humidity.
Preferably, the memory is an EEPROM AT24C04 memory, when the upper limit value and the lower limit value of the temperature and the time parameter are set, the modified values are stored in the memory, and the setting parameters are read from the EEPROM when the system is powered on every time; because the data of the memory is not lost when the power is down, the related parameters do not need to be reset after the system is powered off and powered on again.
Preferably, the manual operation unit adopts a six-foot three-gear boat-shaped switch and has three gears of film rolling, stopping and film releasing.
A comprehensive control method for an electric film rolling machine of a greenhouse is characterized in that when the ventilation state is automatically controlled, a sectional execution mode is adopted in the film rolling and film releasing process, and the specific process is as follows: when the film is required to be rolled or released, the method of full opening or full closing is not adopted, one third of the film is opened or closed each time, after the opening and closing are completed once each time, the second detection is carried out after a period of time, and if the temperature range does not meet the requirement, the next action is carried out until the vent is completely opened or closed;
when the forward rotation is automatically controlled, the first output relay of the automatic control unit controls the output end of the first double-pole double-throw intermediate relay to be directly connected with two connecting ends of the electric film rolling machine, and simultaneously, the output end of the first double-pole double-throw intermediate relay is disconnected with a series circuit of the next stage;
when the automatic control is reversed, a first output relay of the automatic control unit is powered off, and the output relay controls the output end of the first double-pole double-throw intermediate relay to be disconnected with two connecting ends of the electric film rolling machine; meanwhile, the second output relay controls the output end of the second double-pole double-throw intermediate relay to be directly connected with two connecting ends of the electric film rolling machine, and simultaneously, the second output relay disconnects the series circuit with the next stage;
when the forward rotation is remotely controlled, the first output relay of the remote control unit controls the output end of the third double-pole double-throw intermediate relay to be directly connected with two connecting ends of the electric film rolling machine, and simultaneously, the output end of the third double-pole double-throw intermediate relay is disconnected with a series circuit of the next stage;
when the remote control is reversed, the first output relay of the remote control unit is powered off, and the output relay controls the output end of the third double-pole double-throw intermediate relay to be disconnected with the two connecting ends of the electric film rolling machine; and meanwhile, the second output relay of the remote control unit controls the output end of the fourth double-pole double-throw intermediate relay to be directly connected with two connecting ends of the electric film rolling machine, and simultaneously, the output end of the fourth double-pole double-throw intermediate relay is disconnected with a series circuit of the next stage.
The working principle of the invention is as follows:
the greenhouse electric film rolling machine integrated controller is composed of an automatic control unit, a remote control unit, a manual operation unit and an interlocking linkage protection unit.
Three different film rolling control modes based on remote control, manual operation and automatic operation of temperature and humidity detection are established, forward and reverse rotation linkage protection of the film rolling machine in different working modes is realized, the phenomenon that forward and reverse rotation loops are closed simultaneously is avoided, and a power supply is prevented from being short-circuited. The segmented feedback type film rolling control method based on the temperature and the humidity enables the regulation and control process to be more stable and accurate.
The design of a human-computer interface is realized by utilizing independent keys and an LED display, three different control modes based on remote control, manual operation and automatic operation of temperature and humidity detection are completed, a forward and reverse rotation linkage protection circuit of the film rolling machine in different working modes is established, the phenomenon that a forward and reverse rotation loop is closed at any time is ensured, and the short circuit of a power supply is prevented.
The automatic control unit part is formed by splicing an upper layer circuit board and a lower layer circuit board and comprises a six-bit LED nixie tube displayer, four LED light-emitting diodes, four independent keys, two output relays, a temperature and humidity sensor, a data memory and a 32-bit processor.
The six-bit LED nixie tube is used for displaying a temperature value and a humidity value, displaying a set value under a temperature and humidity setting condition, and displaying the time, minute and second which are being set when time is set. For the convenience of distinguishing, the six-digit nixie tube is divided into an upper group and a lower group, each group has three digits, the upper group displays temperature, and the lower group displays humidity. Two of the four light-emitting diodes are used for unit backlight indication of temperature and humidity; the other two control units are in a extinguishing state when working normally, and enter a flickering state when entering a temperature upper limit setting state and a temperature lower limit setting state respectively so as to be distinguished from a normal working state.
Two output relays control the roll membrane of rolling machine respectively and put the membrane, and the normally open contact of relay is when the membrane is rolled up and is put the membrane to needs, and the 12V double-pole double-throw auxiliary relay coil in the switch-on linkage protection unit, the double-pole double-throw auxiliary relay normally open contact is closed, and the rolling machine is electrified corotation or reversal, accomplishes and rolls up the membrane or puts the membrane action.
The remote control unit is realized by adopting a wireless remote control module with codes, and the remote control module has the advantages of wide application, mature technology, stable work and better cost performance. The 24V power supply of the motor generates 12V voltage after voltage reduction to supply power to the remote control module, and the output of the module with a relay is connected with the linkage protection unit. When the film needs to be rolled or unwound, the relay output of the remote control module is connected with a 12V double-pole double-throw intermediate relay coil in the linkage protection unit, the normally open contact of the double-pole double-throw intermediate relay is closed, and the film rolling machine is electrified to rotate forwards or reversely.
The manual operation unit adopts a double-pole three-gear switch, and can realize the film rolling, film releasing and stopping operations.
The interlocking linkage protection unit consists of four 12V double-pole double-throw intermediate relays and four fly-wheel diodes, and has the main functions of preventing power supply short circuit caused by accidental simultaneous actions in different operation modes, ensuring that only one control mode of the system is acted at any moment, and automatically cutting off loops of other two units by the acting unit.
When the controller is in an automatic control ventilation state, a sectional execution mode is adopted when the film is rolled and released, and the specific process is as follows: when the film is required to be rolled or released, the method is not like a method that a common control system adopts one-time full opening or full closing, but only one third of the film is opened and closed each time, and the second detection is carried out after five minutes of interval after the opening and closing are completed each time, if the temperature range does not meet the requirement, the next action is carried out again, the action is carried out for three times in the same direction, and the vent is completely opened or closed.
The controller is installed to be divided into an automatic control unit and a small power distribution cabinet, the automatic control unit is provided with a waterproof plastic shell and is externally connected with a power supply main switch, and the whole automatic control unit can be closed when an automatic control mode is not needed for a long time. The small-sized power distribution cabinet is used for placing an AC/DC converter for generating 24V direct current of a system, a 24V-to-12V DC/DC converter, a circuit breaker and a double-pole double-throw intermediate relay for forming a linkage protection circuit. The emergency stop button is arranged on the upper surface of the shell of the power distribution cabinet and used for powering off the whole controller when an emergency accident happens.
The invention has the following beneficial effects:
1. the automatic control mode of the invention realizes automatic film rolling and ventilation control based on temperature and time, not only improves the scientific rationality of greenhouse temperature and humidity control, but also solves the problems of time and labor waste of the traditional manual mode.
2. The addition of remote control and manual mode meets the diversified operation requirements of users in different seasons and different production stages. When the film rolling machine does not need to act every day, the power supply of the automatic control part can be turned off, and when necessary, remote control or manual operation is selected.
3. The interlocking linkage protection unit realizes the interlocking protection of the system, ensures that only one mode works at any moment, and avoids the problem of power supply short circuit generated when different modes work simultaneously.
4. The sectional execution mode during automatic control avoids the big rise and fall of the temperature in the greenhouse and the frequent action of the film rolling machine caused by the big rise and fall, thereby achieving the purpose of smooth temperature and humidity control process and prolonging the service life of the film rolling machine and the ventilated film.
Drawings
FIG. 1 is a schematic diagram of a comprehensive controller;
FIG. 2 is a schematic diagram of an automatic control unit;
FIG. 3 is an external view of the automatic control unit;
FIG. 4 is a schematic diagram of a relay interlock protection circuit;
fig. 5 is a schematic view of a manual switch connection structure.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
Referring to fig. 1, an integrated controller for an electric film rolling machine of a greenhouse is composed of an automatic control unit 11, a remote control unit 12, a manual operation unit 13 and an interlocking linkage protection unit 14; the automatic control unit 11, the remote control unit 12 and the manual operation unit 13 are connected with the electric film rolling machine through an interlocking linkage protection unit 14.
Fig. 2 is a schematic diagram of the automatic control unit 11: comprises an output relay 26, a temperature and humidity sensor 23, a data memory 25 and a 32-bit processor 24.
The temperature and humidity sensor 23 adopts an AM2320, a communication interface adopts a standard IIC bus, and the length of an outgoing line can reliably work within 5-15 meters during application. The temperature measurement range is-40 ℃ to +80 ℃, and the humidity measurement range is 0 to 99.9% RH; the precision is respectively +/-0.5 ℃ and +/-3% RH; the resolution was 0.1 ℃ and 0.1% RH, respectively; the power supply voltage is 3.1V to 5.5V direct current. The sensor is installed the shell additional alone, for preventing on the canopy water droplet from dripping the inside sensor short circuit that arouses of infiltration behind the shell, installs sealed glue additional on shell upper portion.
The data memory 25 adopts an EEPROM AT24C04 memory, when the temperature upper limit value, the temperature lower limit value and the time parameter are set, the modified values are stored in the memory, and the setting parameters are read from the EEPROM every time the system is powered on. Because the data of the memory is not lost when the power is down, the related parameters do not need to be reset after the system is powered off and powered on again.
As shown in fig. 3, which is an external view of the automatic control unit, the automatic control unit 11 includes six LED nixie tube displays 35 and 36, five LED light-emitting diodes 31, 32, 33, 37 and 38, four independent keys, and two relays 43 and 44 (the output relay 26 includes a relay 43 and a relay 44).
The six-bit LED nixie tube is used for displaying a temperature value and a humidity value, displaying a set value under a temperature and humidity setting condition, and displaying the time, minute and second which are being set when time is set. For the convenience of distinguishing, the six-digit nixie tube is divided into an upper group and a lower group, each group has three digits, the upper group displays temperature, and the lower group displays humidity. The five light-emitting diodes 31 are used for indicating whether the LED is in a set state or not, and are lightened when set, or are extinguished; 37. 38 two units are used for backlight indication of temperature and humidity; the other two 32, 33 are in the off state when the control unit normally works, and enter into the blinking state when entering into the temperature upper and lower limit setting states, respectively, to be distinguished from the normal working state.
The four independent keys are respectively a setting key 34, a shift key 39, an add-subtract key 40 and a confirmation key 41. When the parameters need to be set, the temperature setting mode is entered once by pressing the setting key 34, the upper three-position display displays the upper limit setting value, the lower three-position display displays the lower limit setting value, meanwhile, the upper limit setting indicates the LED diode 32 to flash, and the highest bit of the upper limit temperature display nixie tube flashes; pressing the setting key 34 twice to enter a temperature lower limit setting mode, and simultaneously, the lower limit setting indication LED diode 33 flickers; pressing the set key 34 three times enters the action time setting mode, and the two LED diodes 32, 33 blink simultaneously. Pressing the shift key 39 changes the data bit to be set, and each time the shift key is pressed, the set bit is shifted to the right by one bit, and at the time setting, when the shift key is pressed for the fourth time, the set bit is shifted from the upper group to the first left bit of the lower group.
FIG. 4 is a schematic diagram of a relay interlock protection circuit; the interlocking linkage protection unit 14 consists of four 12V double-pole double-throw intermediate relays 45, 46, 47 and 48 and four freewheeling diodes 50, 51, 52 and 53, and has the main function of preventing power supply short circuit caused by accidental simultaneous actions in different operation modes; each double-pole double-throw intermediate relay and a freewheeling diode form a circuit.
The four double-pole double-throw intermediate relays are independently arranged, each relay is matched with one fly-wheel diode to form a control circuit, and each double-pole double-throw intermediate relay is provided with two corresponding output ends;
the output end of the interlocking linkage unit is provided with a switch circuit, the switch circuit comprises two paths, one path is connected with the output ends of the four double-pole double-throw intermediate relays in series through a bidirectional power supply and then is connected with the manual switch in series and then is connected with two connecting ends of the electric film rolling machine; the other output end of the double-pole double-throw intermediate relay is respectively connected with two connecting ends of the electric film rolling machine;
the two output relays of the automatic control unit and the two output relays of the remote control unit respectively correspond to and control the four double-pole double-throw intermediate relays.
The relay of the remote control unit or the automatic control unit controls the circuit, so that only one control mode of the system is ensured to be acted at any time, and the acted unit automatically cuts off the loops of the other two units; for example, the following steps are carried out: for example, in the automatic control process, when the relay 44 attracts the switch K8, the loop is conducted to the double-pole double-throw intermediate relay 48 to attract the switch K1, so that the film rolling machine is controlled to rotate, and the other switches are in the locking state; if the remote control unit is activated at this time, the double-pole double-throw intermediate relay 45 is activated, and the connection line between the transformer and the double-pole double-throw intermediate relay 48 is cut off, thereby achieving the purpose of automatic interlocking.
The two output relays 43 and 44 respectively control the film rolling and film releasing of the film rolling machine, when the film rolling and film releasing are needed, the normally open contacts of the relays are connected with the coils of the 12V double-pole double-throw intermediate relays 47 and 48 in the linkage protection unit, the normally open contacts of the double-pole double-throw intermediate relays are closed, the film rolling machine 15 is electrified to rotate forwards or backwards, and the film rolling or film releasing action is completed.
The remote control unit 12 is realized by a 315M wireless remote control module with codes. The 24V power supply of the motor generates 12V voltage after voltage reduction to supply power to the remote control module, and the output of the module with the relays 41 and 42 is connected with the linkage protection unit. When the film is required to be rolled or unwound, the output of the relays 41 and 42 of the remote control module is connected with the coils of the 12V double-pole double-throw intermediate relays 45 and 46 in the linkage protection unit, the normally open contact of the double-pole double-throw intermediate relays is closed, and the film rolling machine 15 is electrified to rotate forwards or reversely.
The manual operation unit adopts a double-blade three-gear switch 49, and can realize film rolling, film releasing and stopping operations. Fig. 5 is a wiring schematic diagram of a 6-pin double-pole three-stage switch, wherein a positive terminal 1 is connected with the positive pole of a motor power supply, a negative terminal 2 is connected with the negative pole of the power supply, a first terminal 3 is connected with one end of a film rolling machine, and a second terminal 4 is connected with the other end of the film rolling machine.
When the controller is in an automatic control ventilation state, a sectional execution mode is adopted when the film is rolled and released, and the specific process is as follows: when the film is required to be rolled or released, the method is not like a method that a common control system adopts one-time full opening or full closing, but only one third of the film is opened and closed each time, and the second detection is carried out after five minutes of interval after the opening and closing are completed each time, if the temperature range does not meet the requirement, the next action is carried out again, the action is carried out for three times in the same direction, and the vent is completely opened or closed.
When the forward rotation is automatically controlled, the first output relay of the automatic control unit controls the output end of the first double-pole double-throw intermediate relay to be directly connected with two connecting ends of the electric film rolling machine, and simultaneously, the output end of the first double-pole double-throw intermediate relay is disconnected with a series circuit of the next stage.
When the automatic control is reversed, a first output relay of the automatic control unit is powered off, and the output relay controls the output end of the first double-pole double-throw intermediate relay to be disconnected with two connecting ends of the electric film rolling machine; meanwhile, the second output relay controls the output end of the second double-pole double-throw intermediate relay to be directly connected with two connecting ends of the electric film rolling machine, and simultaneously, the second output relay disconnects the series circuit with the next stage.
When the forward rotation is remotely controlled, the first output relay of the remote control unit controls the output end of the third double-pole double-throw intermediate relay to be directly connected with two connecting ends of the electric film rolling machine, and simultaneously, the output end of the third double-pole double-throw intermediate relay is disconnected with a series circuit of the next stage.
When the remote control is reversed, the first output relay of the remote control unit is powered off, and the output relay controls the output end of the third double-pole double-throw intermediate relay to be disconnected with the two connecting ends of the electric film rolling machine; and meanwhile, the second output relay of the remote control unit controls the output end of the fourth double-pole double-throw intermediate relay to be directly connected with two connecting ends of the electric film rolling machine, and simultaneously, the output end of the fourth double-pole double-throw intermediate relay is disconnected with a series circuit of the next stage.
The controller is installed to be divided into an automatic control unit and a small power distribution cabinet, the automatic control unit is provided with a waterproof plastic shell and is externally connected with a power supply main switch, and the whole automatic control unit can be closed when an automatic control mode is not needed for a long time. The small-sized power distribution cabinet is used for placing an AC/DC converter for generating 24V direct current of a system, a 24V-to-12V DC/DC converter, a circuit breaker and a double-pole double-throw intermediate relay for forming a linkage protection circuit. The emergency stop button is arranged on the upper surface of the shell of the power distribution cabinet and used for powering off the whole controller when an emergency accident happens.

Claims (5)

1. The utility model provides an electronic film rolling machine integrated control ware in greenhouse which characterized in that: the controller consists of an automatic control unit, a remote control unit, a manual operation unit and an interlocking linkage protection unit; the output ends of the automatic control unit, the remote control unit and the manual operation unit are connected with the electric film rolling machine under the control of the interlocking linkage protection unit;
the automatic control unit consists of an upper layer circuit board and a lower layer circuit board, the two circuit boards are formed by inserting a pin header and a pin header, and the automatic control unit comprises a processor, and a sensor, a memory, an input key, a display and two output relays are connected with the processor;
the remote control unit adopts a wireless remote control module with codes and is provided with two relays;
the interlocking linkage protection unit comprises four double-pole double-throw intermediate relays; the four double-pole double-throw intermediate relays are independently arranged, each relay is matched with one fly-wheel diode to form a control circuit, and each double-pole double-throw intermediate relay is provided with two corresponding output ends;
the output end of the interlocking linkage unit is provided with a switch circuit, the switch circuit comprises two paths, one path is connected with the output ends of the four double-pole double-throw intermediate relays in series through a direct-current power supply, then is connected with the manual switch in series, and then is connected with two connecting ends of the electric film rolling machine; the other output end of the double-pole double-throw intermediate relay is respectively connected with two connecting ends of the electric film rolling machine;
the two output relays of the automatic control unit and the two output relays of the remote control unit respectively correspond to and control the four double-pole double-throw intermediate relays;
when the film needs to be rolled or released, the relay of the remote control module or the automatic control unit is switched on a double-pole double-throw intermediate relay coil in the interlocking linkage protection unit, a normally open contact of the double-pole double-throw intermediate relay is closed, and the electric film rolling machine is electrified to rotate forwards or reversely.
2. The electric greenhouse film rolling machine integrated controller according to claim 1, characterized in that: the display adopts a six-bit LED nixie tube and is used for displaying a temperature value and a humidity value, displaying a set value under a temperature and humidity setting condition, and displaying the time, minute and second which are being set when time is set; the six-digit nixie tube is divided into an upper group and a lower group, each group has three digits, the upper group displays temperature, and the lower group displays humidity; two of the four light-emitting diodes are used for unit backlight indication of temperature and humidity.
3. The electric greenhouse film rolling machine integrated controller according to claim 1, characterized in that: the memory adopts an EEPROM AT24C04 memory, when the upper limit value and the lower limit value of the temperature and the time parameter are set, the modified values are stored in the memory, and the setting parameters are read from the EEPROM when the system is electrified every time; because the data of the memory is not lost when the power is down, the related parameters do not need to be reset after the system is powered off and powered on again.
4. The electric greenhouse film rolling machine integrated controller according to claim 1, characterized in that: the manual operation unit adopts a six-foot three-gear boat-shaped switch and has three gears of film rolling, stopping and film releasing.
5. The control method of the greenhouse electric film rolling machine integrated controller according to claim 1, characterized in that: when the ventilation state is automatically controlled, the film rolling and releasing process adopts a segmented execution mode, and the specific process is as follows: when the film is required to be rolled or released, the method of full opening or full closing is not adopted, one third of the film is opened or closed each time, after the opening and closing are completed once each time, the second detection is carried out after a period of time, and if the temperature range does not meet the requirement, the next action is carried out until the vent is completely opened or closed;
when the forward rotation is automatically controlled, the first output relay of the automatic control unit controls the output end of the first double-pole double-throw intermediate relay to be directly connected with two connecting ends of the electric film rolling machine, and simultaneously, the output end of the first double-pole double-throw intermediate relay is disconnected with a series circuit of the next stage;
when the automatic control is reversed, a first output relay of the automatic control unit is powered off, and the output relay controls the output end of the first double-pole double-throw intermediate relay to be disconnected with two connecting ends of the electric film rolling machine; meanwhile, the second output relay controls the output end of the second double-pole double-throw intermediate relay to be directly connected with two connecting ends of the electric film rolling machine, and simultaneously, the second output relay disconnects the series circuit with the next stage;
when the forward rotation is remotely controlled, the first output relay of the remote control unit controls the output end of the third double-pole double-throw intermediate relay to be directly connected with two connecting ends of the electric film rolling machine, and simultaneously, the output end of the third double-pole double-throw intermediate relay is disconnected with a series circuit of the next stage;
when the remote control is reversed, the first output relay of the remote control unit is powered off, and the output relay controls the output end of the third double-pole double-throw intermediate relay to be disconnected with the two connecting ends of the electric film rolling machine; and meanwhile, the second output relay of the remote control unit controls the output end of the fourth double-pole double-throw intermediate relay to be directly connected with two connecting ends of the electric film rolling machine, and simultaneously, the output end of the fourth double-pole double-throw intermediate relay is disconnected with a series circuit of the next stage.
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