CN107172793B - Agricultural greenhouse intelligent light supplementing equipment based on compound control and dimming method thereof - Google Patents
Agricultural greenhouse intelligent light supplementing equipment based on compound control and dimming method thereof Download PDFInfo
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- CN107172793B CN107172793B CN201710557857.7A CN201710557857A CN107172793B CN 107172793 B CN107172793 B CN 107172793B CN 201710557857 A CN201710557857 A CN 201710557857A CN 107172793 B CN107172793 B CN 107172793B
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B47/00—Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
- H05B47/10—Controlling the light source
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/10—Controlling the intensity of the light
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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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection
Abstract
The invention discloses an intelligent light supplementing device for an agricultural greenhouse based on compound control and a light adjusting method thereof, wherein the device comprises the following components: the sensor module is used for collecting external natural illumination signals or superposition signals of the external natural illumination signals and optical signals sent by the optical driving module and converting the superposition signals into electric signals; the analog-to-digital conversion module is used for carrying out analog-to-digital conversion on the electric signals acquired by the sensor module and then transmitting the electric signals to the control module; the control module is used for processing the received digital signals and generating driving signals for controlling the optical driving module; the optical driving module is used for realizing the action of each stepping motor under the control of the driving signal of the control module so as to control the light supplementing light source module; the light supplementing light source module is controlled by the light driving module; the power module is used for providing power for other modules, and the purposes of automatic dimming, intelligent movement, information remote monitoring and the like of the lamp source are achieved through the invention.
Description
Technical Field
The invention relates to the technical field of illumination, in particular to an intelligent light supplementing device for an agricultural greenhouse based on compound control and a dimming method thereof.
Background
The most important growth factor in the growth and development of plants is light. The intensity of the illumination has an important role in the photosynthesis of plants and in the formation of chlorophyll. In nature, the illumination intensity of the sun can be correspondingly changed along with the change of weather, geographic latitude and seasons, so that artificial light supplement has become an important way for promoting plant growth and high yield.
The traditional artificial light supplementing mode adopts a metal halogen lamp, an incandescent lamp and a high-pressure sodium lamp as main light sources for artificial light supplementing, and the light sources can improve agricultural yield, but have the defects of low light efficiency, high energy consumption and the like, and waste of energy sources is also caused to a certain extent. Meanwhile, the problems that the traditional light source cannot achieve close-range illumination of plants and cannot intelligently control illumination intensity are still to be solved.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention aims to provide the intelligent light supplementing equipment for the agricultural greenhouse based on the compound control and the dimming method thereof, which realize the purposes of automatic dimming, intelligent movement, information remote monitoring and the like of a lamp source through the feedforward and feedback compound control of signals.
To achieve the above and other objects, the present invention provides an intelligent light supplementing device for an agricultural greenhouse based on compound control, comprising:
the sensor module is used for collecting external natural illumination signals or superposition signals of the external natural illumination signals and optical signals sent by the optical driving module and converting the superposition signals into electric signals;
the analog-to-digital conversion module is used for carrying out analog-to-digital conversion on the electric signals acquired by the sensor module and then transmitting the electric signals to the control module;
the control module is used for processing the received digital signals and generating driving signals for controlling the optical driving module;
the optical driving module is used for realizing the action of each stepping motor under the control of the driving signal of the control module so as to control the light supplementing light source module;
the light supplementing light source module is controlled by the light driving module;
and the power supply module is used for providing power for other modules.
Further, the control module compares the received digital signal with a theoretical value of illumination intensity required by normal growth of plants, and generates pulse width modulation signals for driving the light driving module according to the difference value of the digital signal and the theoretical value of illumination intensity required by normal growth of plants to control illumination intensity emitted by each stepping motor and the light supplementing light source of the light driving module.
The device further comprises a wireless communication module, a router and an upper computer, wherein the control module carries out digital-to-analog conversion on the received digital signals, then transmits the digital signals to the upper computer through the wireless communication module and the router, the upper computer compares the received digital signals with the theoretical illumination intensity value required by normal growth of plants, finally, the difference value of the received digital signals and the theoretical illumination intensity value is transmitted to the control module after the digital-to-analog conversion is carried out through the router and the wireless communication module, and the control module generates the driving signals according to the difference value of the digital-to-analog conversion.
Further, the sensor module comprises a lampshade photosensitive sensor array and a ground photosensitive sensor array, wherein the lampshade photosensitive sensor array is used for collecting external natural light signals and converting the external natural light signals into electric signals, and the ground photosensitive sensor array is used for collecting superposition signals of the external natural light signals and the light signals emitted by the light driving module and converting the superposition signals into the electric signals.
Further, the light driving module comprises a light source lifting module, a light source rotating module and a light source dimming module, wherein the control module is respectively connected with the light source lifting module, the light source rotating module and the light source dimming module through pulse width modulation signals, the light source lifting module controls the lifting of the light supplementing light source through a stepping motor, the light source rotating module controls the rotation adjustment of the light supplementing light source through the stepping motor, and the light source dimming module is used for adjusting the brightness of the light supplementing light source.
Further, the light source lifting module comprises a light source lifting driving circuit and a first stepping motor, the light source lifting driving circuit is connected with the control module through a pulse width signal wire and is connected with the first stepping motor through an output wire, the light source rotating module comprises a light source rotating driving circuit and a second stepping motor, the light source rotating driving circuit is connected with the control module through a pulse width signal wire and is connected with the second stepping motor through an output wire, the light source dimming module comprises a light source dimming driving circuit, the light source dimming driving circuit is connected with the control module through a pulse width signal wire, and an output wire of the light source dimming driving circuit is connected with an LED array of the light supplementing light source module.
Further, the light supplementing lamp source module comprises a gear, a lamp post, a lamp shade and an LED array, wherein the gear is controlled by the first stepping motor, the gear and the lamp post are completely contacted by mutually matching with saw teeth on two sides of the lamp post, the top end of the lamp post is connected with the light source lifting module, the bottom end of the lamp post is connected with the light source rotating module, the top end of the lamp shade is connected with the light source rotating module, the bottom end of the lamp shade is connected with the light source dimming module, and the LED array is connected with the light source dimming module.
In order to achieve the above purpose, the invention also provides an adjusting method of the intelligent light supplementing equipment of the agricultural greenhouse based on compound control, which comprises the following steps:
step one, collecting illumination signals by using a sensor module and converting the illumination signals into electric signals;
step two, the electric signals collected by the sensor module are subjected to analog-to-digital conversion and converted into digital signals, the digital signals are transmitted to the control module, and the control module is used for processing the received digital signals to generate driving signals for controlling the optical driving module;
and thirdly, under the control of the driving signal of the control module, the action of each stepping motor is realized by utilizing the light driving module so as to control the adjustment of the light supplementing lamp source.
Further, in the second step, the control module samples the electrical signal sampled by the sensor module through the analog-to-digital conversion module, compares the received digital signal with a theoretical illumination intensity value required by normal growth of the plant, and generates a pulse width modulation signal for driving the light driving module according to a difference value between the digital signal and the theoretical illumination intensity value to control the illumination intensity of each stepping motor and the light supplementing light source in the light driving module.
In the second step, the control module performs digital-to-analog conversion on the received digital signal, then transmits the digital signal to the upper computer through the wireless communication module and the router, the upper computer compares the received digital signal with an illumination intensity theoretical value required by normal growth of plants to obtain a difference value of the digital signal and the illumination intensity theoretical value, the difference value is transmitted to the control module through the router and the wireless communication module, and then the control module generates a corresponding driving signal according to the difference value of the digital signal and the illumination intensity theoretical value.
Compared with the prior art, the intelligent light supplementing device for the agricultural greenhouse and the dimming method thereof based on the compound control are characterized in that the sensor module is used for collecting illumination signals of external natural light, the collected illumination information is compared with illumination intensity theoretical values required by normal growth of plants, a driving signal is generated according to comparison results to drive the light driving module to control the action of the light supplementing light source, the light signals of the light supplementing light source are collected by the sensor module for further adjustment, and thus the purposes of automatic dimming, intelligent movement, information remote monitoring and the like of the light source are achieved by carrying out feedforward and feedback compound control on the signals.
Drawings
FIG. 1 is a system architecture diagram of a first preferred embodiment of an intelligent light supplementing device for agricultural greenhouse based on compound control according to the present invention;
FIG. 2 is a system architecture diagram of a second preferred embodiment of intelligent light supplementing equipment for agricultural greenhouse based on compound control according to the present invention;
FIG. 3 is a schematic diagram of a first embodiment of the present invention;
FIG. 4 is a schematic diagram of a second embodiment of the present invention;
FIG. 5 is a schematic diagram of an intelligent light-compensating apparatus according to an embodiment of the invention;
FIG. 6 is a schematic diagram of the application situation of the intelligent light supplementing device for agricultural greenhouse based on the compound control of the invention;
fig. 7 is a flow chart of steps of an adjusting method of intelligent light supplementing equipment for an agricultural greenhouse based on compound control.
Detailed Description
Other advantages and effects of the present invention will become readily apparent to those skilled in the art from the following disclosure, when considered in light of the accompanying drawings, by describing embodiments of the present invention with specific embodiments thereof. The invention may be practiced or carried out in other embodiments and details within the scope and range of equivalents of the various features and advantages of the invention.
FIG. 1 is a system architecture diagram of a first preferred embodiment of an intelligent light supplementing device for agricultural greenhouse based on compound control according to the present invention. As shown in fig. 1, the intelligent light supplementing device for the agricultural greenhouse based on the compound control of the invention comprises: the device comprises a sensor module 11, an analog-to-digital conversion module 12, a control module 13, a light driving module 14, a light supplementing light source module 15 and a power supply module 16.
The sensor module 11 is configured to collect an external natural light signal or a superimposed signal of the external natural light signal and an optical signal sent by the optical driving module 14, and convert the external natural light signal or the superimposed signal of the external natural light signal and the optical signal sent by the optical driving module 14 into an electrical signal, in a specific embodiment of the present invention, the sensor module 11 includes a lampshade photosensitive sensor array 110 and a ground photosensitive sensor array 111, the lampshade photosensitive sensor array 110 is configured to collect an external natural light signal and convert the external natural light signal into the electrical signal, the ground photosensitive sensor array 111 is configured to collect a superimposed signal of the external natural light signal and the optical signal sent by the optical driving module 14 and convert the superimposed signal into the electrical signal; the analog-to-digital conversion module 12 is configured to perform analog-to-digital conversion on the electrical signal collected by the sensor module 11, and convert the electrical signal into a digital signal, and transmit the digital signal to the control module 13; the control module 13 is configured to process the received digital signal to generate a driving signal for controlling the light driving module 14, and in a preferred embodiment of the present invention, the control module 13 samples the electrical signal sampled by the sensor module 11 through the analog-to-digital conversion module 12 every same time period, compares the received digital signal with a theoretical illumination intensity value required by normal growth of the plant, and generates a PWM signal for driving the light driving module 14 according to a difference value between the two signals to control illumination intensities of each stepper motor and the light compensating light source in the light driving module 14; the light driving module 14 is used for realizing the action of each stepping motor under the control of the driving signal of the control module 13 so as to control the adjustment of the light supplementing light source; the light supplementing light source module 15 is controlled by the light driving module 14; the power module 16 is configured to provide power to other modules. In a specific embodiment of the present invention, the light driving module 14 includes a light source lifting module 140, a light source rotating module 141 and a light source dimming module 142, the control module 13 is respectively connected with the light source lifting module 140, the light source rotating module 141 and the light source dimming module 142 through pulse width modulation signals, wherein the light source lifting module 140 controls the lifting of the light supplementing light source through a stepping motor, the light source rotating module 141 controls the rotation adjustment of the light supplementing light source through the stepping motor, the light source dimming module 142 is used for adjusting the brightness of the light supplementing light source, the light supplementing light source module 15 includes a gear, a lamp post, a lampshade and an LED array, the gear is mutually matched with saw teeth on two sides of the lamp post to realize the complete contact between the gear and the lamp post, the top end of the lamp post is connected with the light source lifting module, and the bottom end is connected with the light source rotating module; the top of the lamp shade is connected with the light source rotating module, and the bottom is connected with the light source dimming module.
FIG. 2 is a system architecture diagram of a second preferred embodiment of intelligent light supplementing equipment for agricultural greenhouse based on compound control according to the present invention. In a second preferred embodiment of the present invention, except for each module in the first preferred embodiment, the intelligent light supplementing device for the agricultural greenhouse based on the composite control of the present invention further includes a wireless communication module 17, a router 18 and an upper computer 19, the control module 13 performs digital-to-analog conversion on the received digital signal, and then transmits the digital signal to the upper computer 19 through the wireless communication module 17 and the router 18, the upper computer 19 compares the received digital signal with a theoretical value of illumination intensity required by normal growth of plants, and finally, the difference value between the two is transmitted to the control module 13 after passing through the router 18 and the wireless communication module 17 again and performing analog-to-digital conversion, thereby realizing feedforward control of the whole light supplementing system.
The intelligent light supplementing equipment for the agricultural greenhouse based on the compound control is further described in detail by the following specific embodiments:
examples
As shown in fig. 3, in this embodiment, the intelligent light supplementing device for an agricultural greenhouse of the present invention includes: the device comprises a power module circuit board 1 (corresponding to a power module), a sensor module 2, a control communication integrated board 3 (corresponding to a control module and a wireless communication module), a light driving integrated board 4 (corresponding to a light driving module), a router 5, an upper computer 6, a gear 7, a lamp post 8 and a lamp shade 9. Wherein, the control communication integrated board 3 is provided with a control module 301 and a wireless communication module 302; a light driving integrated board 4 on which a light source lifting module 401, a light source rotating module 402 and a light source dimming module 403 are arranged; the power module circuit board 1 is respectively connected with the positive and negative poles of the power supply of the sensor module 2, the control communication integrated board 3, the optical drive integrated board 4, the router 5 and the upper computer 6; the sensor module 2 is connected with the control module 301 through an analog-to-digital conversion signal wire; the control module 301 is connected with the sensor module 2 through an analog-digital conversion signal wire, is connected with the wireless communication module 302 through a digital-analog conversion signal wire, and is connected with the light source lifting module 401, the light source rotating module 402 and the light source dimming module 403 through pulse width modulation signal wires; the wireless communication module 302 is connected with the control module 301 through an analog-to-digital conversion signal wire, and is in remote wireless connection with the wireless communication module 302 through the router 5; the upper computer 6 is in remote wireless connection with the wireless communication module 302 through the router 5; the gear 7 is mutually matched with saw teeth on two sides of the lamp post 8 to realize complete contact between the gear 7 and the lamp post 8; the lamp post 8 is connected with the light source lifting module 401 at the top end and the light source rotating module 402 at the bottom end; the top end of the lampshade 9 is connected with the light source rotating module 420, and the bottom end of the lampshade is connected with the light source dimming module 403.
Examples
As shown in fig. 4, in this embodiment, the intelligent light supplementing device for an agricultural greenhouse of the present invention includes: the device comprises a power module circuit board 1, a sensor module 2, a control communication integrated board 3, a light driving integrated board 4, a router 5, an upper computer 6, a gear 7, a lamp post 8 and a lamp shade 9; a control communication integrated board 3 on which a control module 301 and a wireless communication module 302 are provided; a light driving integrated board 4 on which a light source lifting module 401, a light source rotating module 402 and a light source dimming module 403 are arranged; the power module circuit board 1 is respectively connected with the positive and negative poles of the power supply of the sensor module 2, the control communication integrated board 3, the optical drive integrated board 4, the router 5 and the upper computer; the sensor module 2 is connected with the control module 301 through an analog-to-digital conversion signal line; the control module 301 is connected with the sensor module 2 through an analog-digital conversion signal wire, is connected with the wireless communication module 302 through a digital-analog conversion signal wire, and is connected with the light source lifting module 401, the light source rotating module 402 and the light source dimming module 403 through pulse width modulation signal wires; the wireless communication module 302 is connected with the control module 301 through an analog-to-digital conversion signal wire, and is in remote wireless connection with the wireless communication module 302 through the router 5; the upper computer 6 is in remote wireless connection with the wireless communication module 302 through the router 5; the gear 7 is mutually matched with saw teeth on two sides of the lamp post 8 to realize complete contact between the gear 7 and the lamp post 8; the lamp post 8 is connected with the light source lifting module 401 at the top end and the light source rotating module 402 at the bottom end; the top end of the lampshade 9 is connected with the light source rotating module 420, and the bottom end of the lampshade is connected with the light source dimming module 403.
In this embodiment, the power module circuit board 1 further includes: a 220V ac power supply 101 and a PWM rectifier 102. The PWM rectifier 102 is composed of a unidirectional voltage type pulse rectifying circuit and a hysteresis control module, and its output end is connected with the power supply of other modules.
In this embodiment, the sensor module 2 further includes: the lamp shade photosensitive sensor array 201 and the ground photosensitive sensor array 202, wherein the lamp shade photosensitive sensor array 201 is arranged on the lamp shade, the ground photosensitive sensor array 202 is arranged on the ground, and the lamp shade photosensitive sensor array 201 and the ground photosensitive sensor array 202 are connected with the control module 301 through analog-to-digital conversion signal wires.
In this embodiment, the control module 301 further includes: a buck and regulated power supply 3012 and a microcontroller 3011 circuit. The voltage reducing and stabilizing module 3012 is connected with the output end of the power module circuit board 1 and the microcontroller 3011 through positive and negative power lines, and the microcontroller 3011 is connected with the lampshade photosensitive sensor array 201 and the ground photosensitive sensor array 202 through analog-to-digital conversion signal lines. The buck and voltage stabilizing module 3012 is a dc power source capable of generating 12V, 5V and 3.3V, and is connected to the microcontroller 3011, the light source lifting module 401, the light source rotating module 402 and the light source dimming module 403 through two positive and negative power lines respectively.
In this embodiment, the router 5 further includes a routing node 501 and a coordinator 502, and realizes data transmission and reception through a serial port.
In this embodiment, the upper computer 6 mainly includes a comparing module 601 for sampling value and predicted value, and the output data thereof is remotely connected with the wireless communication module 302 through the router 5.
In this embodiment, the light source lifting module 401 further includes: the light source lifting drive circuit 4011 and the stepping motor 4012, the light source lifting drive circuit 4011 is a bridge type reversible circuit, which is connected with the microcontroller 3011 through a pulse width signal line and connected with the stepping motor 4012 through an output line.
In this embodiment, the light source rotation module 402 further includes: the light source rotation driving circuit 4021 and the stepping motor 4022, the light source rotation driving circuit 4021 is a bridge type reversible circuit, which is connected to the microcontroller 3011 through a pulse width signal line, and is connected to the stepping motor 4022 through an output line.
In this embodiment, the light source dimming module 403 further includes: the light source dimming driving circuit 4031 is a dc step-down chopper circuit, and is connected to the microcontroller 3011 via a pulse width signal line and to the LED array 4032 via an output line. Specifically, the LED array 4032 is a 2×16 rectangular LED lamp array composed of two kinds of red and blue LED lamps, wherein one column is a red LED lamp and the other column is a blue LED lamp.
Fig. 5 is a schematic structural diagram of an intelligent light supplementing device according to an embodiment of the invention. This green house intelligence light filling equipment includes: PWM rectifier 51, control communication integrated board 52, light source lift drive circuit 53, step motor 54, gear 55, lamp post 56, light source rotation drive circuit 57, light source dimming drive circuit 58, step motor 59, lamp shade photosensitive sensor array 60, lamp shade 61, and ground photosensitive sensor array.
The PWM rectifier 51 is connected with a 220V alternating current power distribution network to realize the reversible conversion of direct current and alternating current; the control communication integrated board 2 provides PWM signals generated by itself to the switching tubes of the light source lifting driving circuit 53, the light source rotation driving circuit 57 and the light source dimming driving circuit 58 through signal lines, and is used for controlling the working states of the switching tubes; and the information transmission of the upper computer and the lower computer is realized through the wireless communication module.
The light source up-down driving circuit 53 is used to drive the stepping motor 54, so that the rotation direction and rotation speed of the two gears 55 are driven by the operation state of the stepping motor 54.
Both sides of the lamp post 56 are saw-toothed and fully engage with the saw teeth of the gear 55. Thus, when the gears rotate, the lamp pole 56 is driven to rise and fall, so that the whole light supplementing light source is driven to rise and fall.
The light source rotation driving circuit 57 drives the stepping motor 59, and controls the rotation speed of the stepping motor 9 according to the on-off condition of the switching tube of the light source rotation driving circuit 57.
The light source dimming driving circuit 58 adjusts the brightness of the lamp light by the control of the PWM signal.
The rotation shaft of the stepping motor 59 is integrally connected with the lamp post 56, thereby realizing the rotation function of the light supplementing lamp source by taking the lamp post 56 as an axis.
The lamp cover 61 is connected to the bottom of the lamp pole 56, and the LED array is disposed at the lower portion thereof, and the lamp cover photosensor array 60 is disposed on the lamp cover 61 to collect external natural light. The ground photosensitive sensor array is arranged on the ground of the agricultural greenhouse.
FIG. 6 is a schematic diagram of the application of the intelligent light supplementing device for agricultural greenhouse based on the compound control. In the specific embodiment of the invention, the system comprises an agricultural greenhouse roof 1, a power distribution network 2, light supplementing equipment (light supplementing table lamps) 3 and a ground photosensitive sensor array 4. The placement mode of the light supplementing device (light supplementing desk lamp) 3 is mainly determined by the illumination area of the light source and the area of the greenhouse, and the position of the ground photosensitive sensor array 4 is required to be placed in the illumination range of the light supplementing light source (light supplementing desk lamp) 3.
Fig. 7 is a step flow chart of a dimming method of intelligent light supplementing equipment for an agricultural greenhouse based on compound control. As shown in fig. 7, the dimming method of the intelligent light supplementing device for the agricultural greenhouse based on the compound control comprises the following steps:
in step 701, the illumination signal is acquired by a sensor module and converted into an electrical signal. In a specific embodiment of the present invention, the sensor module collects an external natural illumination signal or a superimposed signal of the external natural illumination signal and an optical signal sent by the optical driving module, and converts the superimposed signal into an electrical signal:
step 702, performing analog-to-digital conversion on the electric signal collected by the sensor module, converting the electric signal into a digital signal, and transmitting the digital signal to the control module, and processing the received digital signal by using the control module to generate a driving signal for controlling the optical driving module. In the preferred embodiment of the present invention, the control module samples the electrical signal sampled by the sensor module 10 through the analog-to-digital conversion module every the same time period, compares the received digital signal with the theoretical illumination intensity value required by the normal growth of the plant, and generates the PWM signal for driving the light driving module according to the difference value between the two signals to control the illumination intensity of each stepper motor and the light supplementing light source in the light driving module. Preferably, in step 702, the control module may perform digital-to-analog conversion on the received digital signal, and then transmit the digital signal to the upper computer through the wireless communication module and the router, the upper computer compares the received digital signal with a theoretical value of illumination intensity required by normal growth of plants, obtains a difference value between the digital signal and the theoretical value of illumination intensity required by normal growth of plants, and transmits the difference value to the control module through the router and the wireless communication module, and then the control module generates a corresponding driving signal according to the difference value between the digital signal and the theoretical value of illumination intensity, for example, a positive value in the difference value data is set to be high level, and a negative value in the difference value data is set to be low level, so as to generate three paths of PWM signals to the optical driving module.
Step 703, under the control of the driving signal of the control module, the optical driving module is utilized to realize the action of each stepper motor to control the adjustment of the light-compensating light source. In a specific embodiment of the invention, the light driving module comprises a light source lifting module, a light source rotating module and a light source dimming module, wherein the control module is respectively connected with the light source lifting module, the light source rotating module and the light source dimming module through pulse width modulation signals, the light source lifting module controls the lifting of the light supplementing light source through a stepping motor, the light source rotating module controls the rotation adjustment of the light supplementing light source through the stepping motor, and the light source dimming module is used for adjusting the brightness of the light supplementing light source. That is, the three PWM signals generated by the control module control the starting of the stepper motor in the light source lifting module and the stepper motor 4022 in the light source rotating module, and the intensity of illumination emitted by the light source of the LED array in the light source dimming module, respectively.
The dimming method of the present invention will be further described with reference to the embodiment of fig. 4. Specifically, the dimming method comprises the following steps:
when 220V ac power is passed through the power module circuit board 1, the current directions of the voltage and the current are consistent, so that the PWM rectifier 102 is in a rectifying operation state. The 220V alternating current is changed into direct current through the PWM rectifier 102, and electric energy is provided for the sensor module 2, the control module 301 in the control communication integrated board 3, the wireless communication module 302, the router 5 and the upper computer 6;
step two, the step-down and voltage-stabilizing power supply circuit 3012 in the control module 301 steps down the direct current finally output by the power module circuit board 1 into direct current power supplies of 12V, 5V and 3.3V, and provides electric energy for the microcontroller 3011 and the optical driving integrated board 4 through the step-down and voltage-stabilizing power supply circuit 3012;
step three, external natural light signals can be converted into electric signals through the lampshade photosensitive sensor array 201, the electric signals converted into corresponding electric signals are changed according to different illumination intensities, the electric signals converted by the lampshade photosensitive sensor array 201 are sampled through a digital-to-analog conversion module of the microcontroller 3011 every same time period, and data obtained after sampling are transmitted to the upper computer 6 through the wireless communication module 302 and the router 5;
step four, the upper computer 6 compares the data sampled by the microcontroller 3011 with the theoretical value of illumination intensity required by normal growth of plants through the sampling value and predicted value module 601, and finally transmits the difference value of the data and the theoretical value to the microcontroller 3011 through the wireless communication module 302 and the router 5 again, so that feedforward control of the whole light supplementing system is realized;
step five, the microcontroller 3011 processes the data sent by the upper computer, sets the positive value in the data to be high level, and sets the negative value in the data to be low level, so as to generate three paths of PWM signals to respectively control the starting of the stepper motor 4012 in the light source lifting module 401 and the stepper motor 4022 in the light source rotating module 402 and the illumination intensity emitted by the light source of the LED array 4032 in the light source dimming module 403;
step six, after the external natural light signals are overlapped with the light signals emitted by the light sources in the LED array 4032, final light signals are generated and converted into electric signals through the ground photosensitive sensor array 202, the electric signals converted by the ground photosensitive sensor array 202 are sampled through the digital-to-analog conversion module of the microcontroller 3011 in the same time period, and the sampled data are transmitted to the upper computer 6 through the wireless communication module 302 and the router 5;
step seven, the upper computer 6 compares the data sampled by the microcontroller 3011 with the theoretical value of illumination intensity required by normal growth of plants again through the sampling value and predicted value module 601, and finally transmits the difference value of the data and the theoretical value to the microcontroller 3011 through the wireless communication module 302 and the router 5 again, so that the feedback control of the whole light supplementing system is realized;
step eight, the microcontroller 3011 processes according to the data sent by the upper computer, and sets the positive value in the data as high level and the negative value in the data as low level so as to generate three paths of PWM signals;
step nine, the generated first PWM signal controls the stepper motor 4012 in the light source lifting module 401 to rotate forward and backward to drive two gears tightly connected with the stepper motor to rotate clockwise and counterclockwise respectively, so as to control the height of the saw-tooth edge lamp post 8 fully fitting with the saw teeth on the gear 7, the generated second PWM signal controls the rotation speed of the stepper motor 4022 in the light source rotating module 402, so as to realize the rotation function of driving the lamp shade 9 and the light source dimming module 403 connected with the lamp post 8 by taking the lamp post 8 as an axis, and the generated third PWM signal further controls the illumination intensity of the LED array 4032 in the light source dimming module 403;
and step ten, when the current and the voltage in the power module circuit board 1 are opposite in direction, the PWM rectifier 102 is in an inversion working state, and at the moment, the PWM rectifier 102 can convert the direct current which is not used in the system into alternating current and return the alternating current to the power grid so as to realize the recycling of electric energy.
Therefore, the intelligent light supplementing device for the agricultural greenhouse and the dimming method thereof based on the compound control collect illumination signals of external natural light by utilizing the sensor module, compare the collected illumination information with illumination intensity theoretical values required by normal growth of plants, generate driving signals according to comparison results to drive the light driving module to control the action of the light supplementing light source, collect the light signals of the light supplementing light source by the sensor module for further adjustment, and realize the purposes of automatic dimming, intelligent movement, information remote monitoring and the like of the light source by carrying out feedforward and feedback compound control on the signals.
Compared with the prior art, the invention has the following beneficial effects:
1. the invention adopts the PWM rectifier on the power module circuit board, which can convert the alternating current in the power grid into direct current through the bridge diode, and supply the direct current to the intermediate energy storage loop or load, and at the same time, can convert the direct current into alternating current through the IGBT and feed the alternating current back to the power grid. The energy conversion device can realize reversible conversion or transmission of energy, and effectively realize reasonable conversion and utilization of energy.
2. The LED light source is used as a light supplementing light source, and has the characteristics of energy conservation, environmental protection, long service life, low cost, high photoelectric conversion efficiency, narrow wave band, adjustable light intensity and the like. The characteristics determine that the light source can save energy and reduce cost and can improve the light supplementing efficiency of the whole intelligent light supplementing system.
3. The invention can change the relative height of the light source from the plant while the light intensity of the light source changes along with the external environment, thereby further realizing the adjustment of the light intensity of the light source. Thus, the plant can grow under proper illumination intensity, not only can reduce useless loss of electric energy, but also can promote efficient growth of the plant.
4. When the illumination of the external environment changes, the invention not only can change the illumination intensity emitted by the light source, but also can enable the light source to rotate along with the change of the external environment, the rotation of the light source increases the illumination area of the light source, and the number of the light sources can be effectively saved, thereby realizing the aims of saving cost, reducing energy consumption and the like.
5. The invention divides the photosensitive sensor array into a lamp shade and a ground, the photosensitive sensor array on the lamp shade samples natural light intensity signals and converts the signals into electric signals to realize feedforward control of the whole light supplementing system, and the photosensitive sensor array on the ground samples light signals obtained by overlapping natural light intensity and light intensity of a light source and converts the signals into electric signals to realize feedback control of the whole system; the control method of the composite control which is used by the feedforward control and the feedback control simultaneously is used for controlling the rotation speed, the lifting height and the illumination intensity of the light source, so that the whole light supplementing system can be quickly and accurately adjusted along with the change of the external environment. This sensitive and accurate adjustment allows the system to be more intelligent while also reducing some unnecessary energy loss.
6. The invention realizes the integration of the lamp source rotation and the lifting system by utilizing the connection mode of the lamp post and the lamp source lifting module and the rotation module, and realizes the corresponding adjustment of the lifting height and the rotation speed of the lamp source along with the external change by controlling the stepping motor, thus the volume of the lamp source becomes small and exquisite, the regular inspection and maintenance are convenient, and the wiring difficulty of the whole system is reduced.
7. The invention adopts a wireless communication mode to realize the data transmission between the lower computer and the upper computer, can transmit the data sampled by the lower computer to the upper computer at any time, is convenient for the acquisition and the processing of the data, and the upper computer can also feed back the processed data to the lower computer through the wireless communication mode. The bidirectional data transmission mode improves the data transmission speed, enhances the data processing capacity, and improves the dimming accuracy of the whole light supplementing system.
The invention adopts a bridge type reversible circuit when controlling the stepping motor, and realizes the on-off of a switching tube in the circuit through PWM waves generated by a microprocessor, thereby controlling the forward and reverse rotation and the rotating speed of the stepping motor.
The above embodiments are merely illustrative of the principles of the present invention and its effectiveness, and are not intended to limit the invention. Modifications and variations may be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the invention. Accordingly, the scope of the invention is to be indicated by the appended claims.
Claims (6)
1. Green house intelligence light filling equipment based on compound control includes:
the sensor module is used for collecting external natural illumination signals or superposition signals of the external natural illumination signals and optical signals sent by the optical driving module and converting the superposition signals into electric signals;
the analog-to-digital conversion module is used for carrying out analog-to-digital conversion on the electric signals acquired by the sensor module and then transmitting the electric signals to the control module;
the control module is used for processing the received digital signals and generating driving signals for controlling the optical driving module; the method comprises one of the following steps:
the control module compares the received digital signal with a theoretical value of illumination intensity required by normal growth of plants, and generates a pulse width modulation signal for driving the light driving module according to the difference value of the digital signal and the theoretical value of illumination intensity required by normal growth of plants so as to control illumination intensity emitted by each stepping motor and the light supplementing light source of the light driving module; or alternatively, the first and second heat exchangers may be,
the device also comprises a wireless communication module, a router and an upper computer, wherein the control module carries out digital-to-analog conversion on the received digital signals, then transmits the digital signals to the upper computer through the wireless communication module and the router, the upper computer compares the received digital signals with the theoretical value of illumination intensity required by normal growth of plants, finally, the difference value of the received digital signals and the theoretical value of illumination intensity required by normal growth of plants passes through the router and the wireless communication module again, carries out analog-to-digital conversion and then transmits the converted digital signals to the control module, and the control module generates the driving signals according to the difference value of the received digital signals and the theoretical value of illumination intensity required by normal growth of plants;
the optical driving module is used for realizing the action of each stepping motor under the control of the driving signal of the control module so as to control the light supplementing light source module; the light driving module comprises a light source lifting module, a light source rotating module and a light source dimming module, wherein the control module is respectively connected with the light source lifting module, the light source rotating module and the light source dimming module through pulse width modulation signals, the light source lifting module controls the lifting of the light supplementing light source through a stepping motor, the light source rotating module controls the rotation adjustment of the light supplementing light source through the stepping motor, and the light source dimming module is used for adjusting the brightness of the light supplementing light source;
the light supplementing light source module is controlled by the light driving module;
the power module is used for providing power for other modules;
the sensor module comprises a lampshade photosensitive sensor array and a ground photosensitive sensor array, wherein the lampshade photosensitive sensor array is used for collecting external natural light signals and converting the external natural light signals into electric signals, and the ground photosensitive sensor array is used for collecting superposition signals of the external natural light signals and light signals sent by the light driving module and converting the superposition signals into the electric signals.
2. The intelligent light supplementing device for the agricultural greenhouse based on compound control as claimed in claim 1, wherein: the light source lifting module comprises a light source lifting driving circuit and a first stepping motor, the light source lifting driving circuit is connected with the control module through a pulse width signal wire and is connected with the first stepping motor through an output wire, the light source rotating module comprises a light source rotating driving circuit and a second stepping motor, the light source rotating driving circuit is connected with the control module through a pulse width signal wire and is connected with the second stepping motor through an output wire, the light source dimming module comprises a light source dimming driving circuit, the light source dimming driving circuit is connected with the control module through a pulse width signal wire, and an output wire of the light source dimming driving circuit is connected with an LED array of the light supplementing light source module.
3. The intelligent light supplementing device for the agricultural greenhouse based on compound control according to claim 2, wherein the light supplementing light source module comprises a gear, a lamp post, a lamp shade and an LED array, the gear is controlled by the first stepping motor, the gear and the lamp post are completely contacted by mutually matching with saw teeth on two sides of the lamp post, the top end of the lamp post is connected with the light source lifting module, the bottom end of the lamp post is connected with the light source rotating module, the top end of the lamp shade is connected with the light source rotating module, the bottom end of the lamp shade is connected with the light source dimming module, and the LED array is connected with the light source dimming module.
4. The method for adjusting intelligent light supplementing equipment of an agricultural greenhouse based on compound control according to any one of claims 1 to 3, comprising the following steps:
step one, collecting illumination signals by using a sensor module and converting the illumination signals into electric signals;
step two, the electric signals collected by the sensor module are subjected to analog-to-digital conversion and converted into digital signals, the digital signals are transmitted to the control module, and the control module is used for processing the received digital signals to generate driving signals for controlling the optical driving module;
and thirdly, under the control of the driving signal of the control module, the action of each stepping motor is realized by utilizing the light driving module so as to control the adjustment of the light supplementing lamp source.
5. The method for adjusting intelligent light supplementing equipment of agricultural greenhouse based on compound control as claimed in claim 4, wherein the method comprises the following steps: in the second step, the control module samples the electrical signal sampled by the sensor module through the analog-to-digital conversion module, compares the received digital signal with a theoretical illumination intensity value required by normal growth of plants, and generates a pulse width modulation signal for driving the light driving module according to the difference value of the digital signal and the theoretical illumination intensity value to control the illumination intensity of each stepping motor and the light supplementing light source in the light driving module.
6. The method for adjusting intelligent light supplementing equipment of agricultural greenhouse based on compound control as claimed in claim 5, wherein the method comprises the following steps: in the second step, the control module performs digital-to-analog conversion on the received digital signal, then transmits the digital signal to the upper computer through the wireless communication module and the router, the upper computer compares the received digital signal with a theoretical value of illumination intensity required by normal growth of plants, a difference value of the digital signal and the theoretical value of illumination intensity is obtained, the difference value is transmitted to the control module through the router and the wireless communication module, and then the control module generates a corresponding driving signal according to the difference value of the digital signal and the theoretical value of illumination intensity.
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| CN108826147A (en) * | 2018-05-11 | 2018-11-16 | 广州天键光电科技有限公司 | Sense light and its control method |
| CN110771404A (en) * | 2019-11-30 | 2020-02-11 | 宁波大龙农业科技有限公司 | Intelligent light filling device grows seedlings |
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