An intelligent laser plant light supplement device

Abstract

The present invention discloses an intelligent laser plant light supplementor, which comprises a main unit and a bracket. The main unit includes a light supplementing system and a light supplementing regulation system. The light supplementing system includes a Laser light source module and a light source driving circuit. The intelligent laser plant light supplementor of the present invention can view real-time light supplementing information through a touch screen and can also modify light supplementing parameters. The light supplementing information and light supplementing parameters include: light supplementing mode, light supplementing intensity, current time, and automatic light supplementing time. The overall system has a high degree of intelligence, high control precision, high light supplementing efficiency, and a wide light supplementing range, and is suitable for large-scale plant light supplementing in agriculture and has a market promotion prospect.

Description

Technical Field

[0001] The present invention belongs to the technical field of plant supplementary lighting, and particularly relates to an intelligent laser plant supplementary lighting device. Background Art

[0002] In recent years, common plant supplementary lighting lamps on the market are mostly fluorescent lamps, high-pressure sodium lamps, halogen lamps, and LED lamps. However, such products cannot perform differential supplementary lighting according to the needs of plants themselves, and a large amount of energy in many spectral parts is wasted, resulting in low supplementary lighting efficiency. Therefore, their application environments and functions are limited, and it is difficult to provide the best light environment for plants, making them not suitable for large-scale popularization and application in agriculture.

[0003] Using a laser plant supplementary lighting device can significantly increase fruit yield and promote fruit ripening. Taking strawberries as an example, the experimental results show that the average single fruit weight and the yield per plant of strawberry plants treated with laser supplementary lighting are higher than those of normal strawberry plants, and the contents of soluble solids, total sugar, and total acid in the fruits are significantly higher than those of normal strawberry plants, indicating that using laser supplementary lighting is also beneficial to the storage of nutrients and can significantly improve the quality of strawberry fruits. Therefore, it is very important to develop a laser plant supplementary lighting device to solve the problems of low supplementary lighting efficiency and poor power distribution, and at the same time, it also has adjustable spectrum and light intensity and can provide full-spectrum irradiation ability. Summary of the Invention

[0004] Aiming at the problems and deficiencies in the field of plant supplementary lighting, such as the inability to perform differential supplementary lighting according to the needs of plants themselves, the present invention provides an intelligent laser supplementary lighting device. The intelligent laser supplementary lighting device uses a Laser light source module to solve the problems of low heat dissipation efficiency, uneven light output, and poor power distribution of general supplementary lighting devices; at the same time, it not only allows users to set the supplementary lighting intensity and time, but also can perform automatic supplementary lighting, with a very high degree of intelligence.

[0005] To achieve the above object, the technical solution of the present invention is as follows:

[0006] An intelligent laser plant supplementary lighting device includes: a main unit 1, a bracket 2, and a power adapter interface 3. The main unit is connected to the bracket through a buckle, and the power interface is connected to a power adapter for supplying power to the supplementary lighting device.

[0007] Among them, the main unit includes a supplementary lighting system and a supplementary lighting control system. The supplementary lighting system includes a Laser light source module and a light source drive circuit 6. The Laser light source module is composed of a plurality of laser lamps 4 distributed in an array, a heat dissipation sleeve 5, and a housing 9. The Laser light source module is connected to the light source drive circuit through a wire; the supplementary lighting control system includes a main control module 7 and a host computer 8. The main control module further includes a main control chip 10, a supplementary lighting intensity control circuit 11, a host computer interface 12, a power interface 13, a simulation interface 14, and a crystal oscillator circuit 15;

[0008] The main control chip, fill light intensity control circuit, host computer interface, power supply interface, simulation interface, and crystal oscillator circuit are located on the circuit board. The main control chip has a total of 64 pins. The fill light intensity control circuit is connected to the DAC_OUT1 and DAC_OUT2 pins of the main control chip. The host computer interface is connected to the USART2_TX and USART2_RX pins of the main control chip. The power supply interface is connected to the VSS and VDD pins of the main control chip. The simulation interface is connected to the SWCLK and SWDIO pins of the main control chip. The crystal oscillator circuit is connected to the OSC_IN, OSC_OUT, OSC32_IN, and OSC32_OUT pins of the main control chip;

[0009] The present invention has the following beneficial effects:

[0010] 1) The present invention uses a capacitive touch screen as the host computer. Users can understand and set the fill light parameters through the touch screen, including: fill light mode, fill light time, and fill light intensity. The touch screen sends the fill light parameters to the main control module through serial communication, and the main control module controls the fill light system to perform fill light according to the fill light parameters.

[0011] 2) The present invention uses a laser lamp as the light source. Laser fill light has the characteristics of adjustable spectrum and light intensity, and can provide full-spectrum irradiation ability. The Laser light source module adopts a 3×3 square array design, which is convenient for splicing and expansion, and is suitable for large-area fill light in agriculture. The light source drive circuit independently developed by us has good output current stability, and uses PWM pulse width modulation technology to control the fill light intensity, making the control effect more accurate.

[0012] 3) The present invention provides two control methods: manual and automatic. Manual control means that the user manually clicks the corresponding button to perform fill light operations. Automatic means that the fill light device is controlled by using the fill light time set by the user and the real-time clock of the single-chip microcomputer, so that the opening and closing of the fill light device can be automatically controlled. Description of the Drawings

[0013] Figure 1 is a physical diagram of the intelligent laser plant fill light device of the present invention.

[0014] Figure 2 is a structural diagram of the present invention.

[0015] Figure 3 is a physical diagram of the PCB circuit board of the present invention.

[0016] Figure 4 is a system diagram of the main control module of the present invention.

[0017] Figure 5 is a schematic diagram of the main control module chip of the present invention.

[0018] Figure 6This is the drive circuit diagram of the blue laser diode of the present invention.

[0019] Figure 7 This is the drive circuit diagram of the red laser diode of the present invention.

[0020] Figure 8 This is the schematic diagram of the laser diode enable control interface of the present invention.

[0021] Figure 9 This is the drive circuit diagram of the blue laser diode light intensity control of the present invention.

[0022] Figure 10 This is the drive circuit diagram of the red laser diode light intensity control of the present invention.

[0023] Figure 11 This is the schematic diagram of the host computer interface of the present invention.

[0024] Figure 12 This is the crystal oscillator circuit diagram of the present invention.

[0025] Figure 13 This is the schematic diagram of the simulation interface of the present invention.

[0026] Figure 14 This is the 24V input power supply circuit diagram of the present invention.

[0027] Figure 15 This is the 6.5V output power supply circuit diagram of the present invention.

[0028] Figure 16 This is the 3.3V output power supply circuit diagram of the present invention.

[0029] Figure 17 This is the schematic diagram of the main program control flow of the present invention.

[0030] Figure 18 This is the schematic diagram of the fill light processing flow of the present invention.

[0031] Figure 19 This is the schematic diagram of the host computer system status display of the present invention.

[0032] Figure 20 This is the schematic diagram of the host computer parameter setting of the present invention.

[0033] In the figure, 1 - host computer, 2 - bracket, 3 - power adapter interface, 4 - laser lamp, 5 - aluminum heat dissipation sleeve, 6 - light source drive circuit, 7 - main control module, 8 - host computer, 9 - housing, 10 - main control chip, 11 - fill light intensity control circuit, 12 - host computer interface, 13 - power interface, 14 - simulation interface, 15 - crystal oscillator circuit. Detailed implementation manners

[0034] The following introduces the detailed technical solution of the present invention with reference to the accompanying drawings:

[0035] The content to be protected by the present invention includes:

[0036] (1) Light source drive circuit

[0037] The present invention designs two Laser light source modules, namely red light and blue light.

[0038] The light source drive circuits of the red laser lamp and the blue laser lamp are basically the same ( Figure 6 、 Figure 7 ). Since the rated currents of the red laser lamp and the blue laser lamp are different, the resistance value of the sampling resistor R6 in the light source drive circuit is different.

[0039] Three laser lamps are connected in series for each path. Taking the blue laser lamp as an example, the typical voltage drop is 4.8V, and the voltage drop of three laser lamps connected in series is 14.4V. Since a 24V input voltage is used, a buck circuit needs to be designed to supply power to the laser lamps. The TPS54202DDCR chip is selected as the buck chip. The TPS54202DDCR chip is an output-adjustable synchronous buck converter, which has a wide input voltage range of 4.5V to 28V and a maximum continuous output current of 2A.

[0040] The VIN pin of this chip is the input voltage power supply pin, connected to the 24V input power supply. In order to remove the interference of high-frequency signals, a decoupling capacitor is connected in parallel on the VIN pin; the GND pin is grounded; the EN pin is the enable pin, and the voltage range of this pin is -0.3 - 7V. When the pin voltage is greater than 1.21V, the chip enables and starts bucking, and this pin is controlled by the single-chip microcomputer; the BOOT pin is the power input of the internal drive circuit of the chip; the SW pin is the power output pin; the FB pin is the feedback pin. When the voltage of the FB pin is not equal to the internal reference voltage of the chip, the chip will automatically adjust the output voltage until the voltage of the FB pin is equal to the reference voltage.

[0041] A 0.1uF ceramic capacitor must be connected between the SW pin and the BOOT pin to ensure the normal operation of the chip. L1, C3, C4, and C5 are output filtering components, whose function is to keep the output voltage stable. R6 is a sampling resistor. Since the optical power of the laser lamp is related to the current, constant current control is required to ensure the stable operation of the laser lamp. Therefore, a sampling resistor is connected in series. The voltage of the sampling resistor is related to the voltage of the FB pin. When the circuit is stable, the voltage of the sampling resistor will remain constant, so that the current of the laser lamp remains constant. U2A and the peripheral circuit form a non-inverting adder, whose function is to make the input voltage of FB equal to V_BIAS_RED / V_BIAS_BLUE plus the voltage of the sampling resistor. U2B and the peripheral circuit form a voltage follower, whose function is to make the non-inverting input voltage always equal to the output voltage; isolate the front and back stages of the circuit; improve the load-carrying capacity of the circuit.

[0042] C1 and C6 are ceramic capacitors with a capacitance value of 0.1uF / 50V; C2 is a decoupling capacitor with a capacitance value of 22uF / 50V; C3 and C4 are ceramic capacitors with a capacitance value of 22uF / 50V; C5 is a ceramic capacitor with a capacitance value of 220pF / 25V; L1 is an inductor with an inductance value of 22uH; R1, R2, R3, R4, and R5 are surface mount resistors with a resistance value of 24.9kΩ; R6 is a surface mount resistor with a resistance value of 200mΩ for the light source drive circuit of the blue laser lamp and 500mΩ for the light source drive circuit of the red laser lamp; U2A and U2B are low-power operational amplifiers.

[0043] (2) Fill light intensity control circuit

[0044] Figure 9 、 Figure 10 In it, the range of V_BIAS_BLUE is 466 - 556mV, the range of V_BIAS_RED is 446 - 556mV, and the output range of LM258 is 20mV - 1.6V. It can be seen from the above that the input voltage of the FB pin of the TPS54202DDCR chip is equal to V_BIAS_RED / V_BIAS_BLUE plus the voltage of the sampling resistor. When the drive circuit is stable, the input voltage of FB will remain constant. When the magnitude of V_BIAS_RED / V_BIAS_BLUE is changed, the voltage of the sampling resistor will change accordingly, thereby changing the current flowing through the laser lamp and changing the fill light intensity. It can be seen from the characteristic curve of the laser lamp that when the current changes, the change rate of the optical power is relatively large. Therefore, it is necessary to ensure the stability of the current flowing through the laser lamp. Using the DAC function of the single-chip microcomputer to output V_BIAS_RED / V_BIAS_BLUE through a voltage follower can ensure the accuracy and precision of the fill light intensity control.

[0045] (3) Host computer design interface

[0046] Considering the usage site and users of the plant supplementary lighting device, we choose to use a capacitive touch screen as the host computer. Its advantages lie in convenient operation and intuitive interface. At the same time, we also designed a "Help" page to enable users to quickly learn how to use the supplementary lighting device.

[0047] Figure 19 This is the "System Status" interface of the host computer. Users can view the current status information of the system on this page, including: current time, supplementary lighting intensity, supplementary lighting mode, and automatic supplementary lighting time. If users want to modify the supplementary lighting parameters, they can click the "Settings" button to enter the "Parameter Settings" page (see Figure 20 ). The specific modification method can be viewed by clicking the "Help" button to enter the user manual. After users set the supplementary lighting parameters, they can click the "Back" button to enter the "System Status" page to check whether the parameters are set successfully.

[0048] The present invention provides two control methods: manual and automatic. Manual control means that users manually click the corresponding buttons to perform supplementary lighting operations. When users click "Manual - On", the supplementary lighting device will continuously perform supplementary lighting; when users click "Manual - Off", the supplementary lighting device will stop supplementary lighting. Automatic means that the supplementary lighting device is controlled by using the supplementary lighting time set by users and the real - time clock of the single - chip microcomputer, so that the opening and closing of the supplementary lighting device can be automatically controlled. When users select "Automatic", the supplementary lighting device will perform supplementary lighting according to the "Automatic Supplementary Lighting Time" set by users. The present invention provides 4 automatic supplementary lighting time periods for users to set. When the supplementary lighting mode is set to "Automatic", the current time must be set correctly. Users can also modify the current time, and all times of this device adopt the 24 - hour system.

[0049] The present invention reflects the current supplementary lighting intensity of the device in the form of a percentage. 100% represents the maximum supplementary lighting intensity of the device, and users can set the supplementary lighting intensity within the range of 0% - 100%.

[0050] Figure 11 This is the host computer interface. Communication between the host computer and the main control module is through a serial port.

[0051] Figure 12 This is the external crystal oscillator circuit of the single - chip microcomputer. Y1 is an 8MHz crystal oscillator; Y2 is a 32.768KHz crystal oscillator; C14 and C15 are capacitors with a capacitance value of 16pF / 6.3V; C57 and C58 are capacitors with a capacitance value of 10pF / 6.3V.

[0052] Figure 13 This is the simulation interface used to connect the ST_LINK / V2 emulator, which is convenient for debugging programs and downloading programs.

[0053] Figure 14It is a circuit diagram for 24V power input. J1 is a socket, connected to the power adapter; D1 is an anti-reverse insertion diode, with the model number 1N5817; C18 and C19 are capacitors, with the capacitance value of 22uF / 50V.

[0054] Figure 15 It is a circuit diagram for 6.5V output power supply. The maximum output current is 2A. The TPS54202DDCR chip is used to step down the 24V input voltage to 6.5V output. C20 is a ceramic capacitor, with the capacitance value of 0.1uF / 50V; C21 is a decoupling capacitor, with the capacitance value of 22uF / 50V; C24 and C25 are surface mount capacitors, with the capacitance value of 22uF / 50V; C26 is a surface mount capacitor, with the capacitance value of 220pF / 25V; L2 is an inductor, with the inductance value of 22uH; R10 is a surface mount resistor, with the resistance value of 75kΩ; R11 is a surface mount resistor, with the resistance value of 10kΩ.

[0055] Figure 16 It is a circuit diagram for 3.3V output power supply. The maximum output current is 150mA. The TLV70433DBV low-voltage regulator chip is used to step down the 6.5V input voltage to 3.3V output. C22 is a surface mount capacitor, with the capacitance value of 22uF / 50V; C22 is a surface mount capacitor, with the capacitance value of 10uF / 10V.

[0056] Figure 17 It is a flowchart of the main program of the single-chip microcomputer. The main program also includes control programs for clock reading, DAC output, pulse width modulation, serial port communication, and fill light processing. Among them, the most important one is the control program for fill light processing. The control flowchart is shown in Figure 18 .

Claims

1. An intelligent laser plant light supplement device, characterized in that: Including: A main unit (1) and a bracket (2). There is a power adapter interface (3) on the right side of the lower surface of the main unit. The main unit and the bracket are connected by a buckle. The power interface is connected to a power adapter that matches it to supply power to the intelligent laser plant light supplementer; Among them, the main unit includes a light supplement system and a light supplement control system. Among them, the light supplement system includes a Laser light source module and a light source drive circuit (6). The Laser light source module is composed of a plurality of laser lamps (4) distributed in an array, a heat dissipation sleeve (5) and a housing (9). The Laser light source module is connected to the light source drive circuit through a wire. The light supplement control system includes a main control module (7) and a host computer (8). The main control module further includes a main control chip (10), a light supplement intensity control circuit (11), a host computer interface (12), a power interface (13), a simulation interface (14), a crystal oscillator circuit (15), and a circuit main board. The main control chip, the light supplement intensity control circuit, the host computer interface, the power interface, the simulation interface, and the crystal oscillator circuit are located on the circuit main board. The main control chip has a total of 64 pins. The light supplement intensity control circuit is connected to the DAC_OUT1 and DAC_OUT2 pins of the main control chip. The host computer interface is connected to the USART2_TX and USART2_RX pins of the main control chip. The power interface is connected to the VSS and VDD pins of the main control chip. The simulation interface is connected to the SWCLK and SWDIO pins of the main control chip. The crystal oscillator circuit is connected to the OSC_IN, OSC_OUT, OSC32_IN, and OSC32_OUT pins of the main control chip; The Laser light source module includes two types: a red light source module and a blue light source module. The red light source module uses a red laser lamp and a red light source drive circuit. The blue light source module uses a blue laser lamp and a blue light source drive circuit. The rated currents of the red laser lamp and the blue laser lamp are different, and the resistance values of the sampling resistors R6 of the red light source drive circuit and the blue light source drive circuit are different. Three laser lamps are connected in series in each path. The TPS54202DDCR chip is used as a buck chip. The VIN pin of the light source drive circuit is the input voltage power pin, which is connected to a 24V input power supply to remove the interference of high-frequency signals. A decoupling capacitor is connected in parallel on the VIN pin. The GND pin is grounded. The EN pin is the enable pin, and its voltage range is -0.3 - 7V. When the pin voltage is greater than 1.21V, the light source drive circuit enables and starts to step down. This pin is controlled by a single-chip microcomputer. The BOOT pin is the power input of the internal drive circuit of the chip. The SW pin is the power output pin. The FB pin is the feedback pin. When the voltage of the FB pin is not equal to the reference voltage inside the light source drive circuit, the light source drive circuit will automatically adjust the output voltage until the voltage of the FB pin is equal to the reference voltage; A 0.1uF ceramic capacitor is connected between the SW pin and the BOOT pin. L1, C3, C4, and C5 are output filtering components to keep the output voltage stable. L1 is connected to SW and C1. C3, C4, and C5 are connected in parallel and then connected to L1. C3 and C4 are grounded, and C5 is connected to R2. R6 is a sampling resistor. The voltage of the sampling resistor is related to the voltage of the FB pin. When the circuit is stable, the voltage of the sampling resistor remains constant, thus keeping the current of the laser lamp constant. U2A and U2B are low-power operational amplifiers. U2A and the peripheral circuit form a non-inverting adder, making the input voltage of FB equal to V_BIAS_RED / V_BIAS_BLUE plus the voltage of the sampling resistor. U2B and the peripheral circuit form a voltage follower, making the non-inverting input voltage always equal to the output voltage. C1 and C6 are ceramic capacitors with a capacitance value of 0.1uF / 50V. C2 is a decoupling capacitor with a capacitance value of 22uF / 50V. C3 and C4 are ceramic capacitors with a capacitance value of 22uF / 50V. C5 is a ceramic capacitor with a capacitance value of 220pF / 25V. L1 is an inductor with an inductance value of 22uH. R1, R2, R3, R4, and R5 are surface mount resistors with a resistance value of 24.9kΩ. R6 is a surface mount resistor. The resistance value of the blue light source drive circuit is 200mΩ, and the resistance value of the red light source drive circuit is 500mΩ. The user can view the current status information of the system through the "System Status" interface of the upper computer. The "System Status" interface includes: "Help" button, "Settings" button, current time, fill light intensity, fill light mode, and automatic fill light time. The "Parameter Settings" interface includes: "Return" button, setting the automatic fill light time, setting the system clock, setting the fill light intensity, and setting the fill light mode. The user clicks the "Settings" button to enter the "Parameter Settings" page to modify the fill light parameters. The specific modification method is to click the "Help" button to enter the user manual interface for viewing. After the user sets the fill light parameters, click the "Return" button to enter the "System Status" page to check whether the parameters are set successfully.

Images