Cotton field water-saving irrigation system based on mains-power-complemented photovoltaic power supply

Abstract

The present invention belongs to the field of cotton field water-saving irrigation. Disclosed is a cotton field water-saving irrigation system based on mains-power-complemented photovoltaic power supp

Description

[0002] The present disclosure relates to the field of water-saving irrigation for a cotton field, and in particular to a water-saving irrigation system for a cotton field based on mains and photovoltaic complementary power supply. BACKGROUND

[0003] Xinjiang Uygur Autonomous Region is a main cotton production region in China. It is located in the northwest inland, and is a severe dry and water shortage region. Because water resources are scarce, some water-saving measures are taken usually. For example, drip irrigation and sprinkler irrigation replace convolutional broad irrigation. This effectively saves the water resources. With the development of intelligence, an intelligent water-saving irrigation system is gradually applied to farmland irrigation. The intelligent water-saving irrigation system performs intelligent irrigation based on soil humidity and irrigation control strategies for different growth periods of cotton, to improve a utilization rate of the water resources.

[0004] At present, a photovoltaic system is used to supply power to an intelligent water-saving irrigation system that is most commonly used for farmland. Due to the photovoltaic system, electricity is greatly saved, and costs of electricity are reduced. However, on cloudy days or days with little sunshine for a long period of time, efficiency of converting photovoltaics into electric energy is low, and a battery voltage is reduced. As a result, an electric valve cannot be opened and closed normally. In addition, a failure rate of a photovoltaic power supply system is high. When the photovoltaic power supply system fails, the intelligent water-saving irrigation system is in a state of paralysis, and cannot run normally. If the intelligent water-saving irrigation system cannot be recovered in time, an agricultural production process is affected, resulting in economic losses. SUMMARY

[0005] The present disclosure provides a water-saving irrigation system for a cotton field based on mains and photovoltaic complementary power supply, to implement complementation between mains power supply and photovoltaic power supply. When the photovoltaic power supply fails, the system automatically switches to the mains power supply, to ensure stable power supply of the water-saving irrigation system for a cotton field and maintain normal work of the water-saving irrigation system for a cotton field.

[0006] The present disclosure provides a water-saving irrigation system for a cotton field based on mains and photovoltaic complementary power supply. The system includes: a mains and photovoltaic complementary power supply system, an information detection system, a valve drive and control system, an electric valve, and a remote monitoring center. The mains and photovoltaic complementary power supply system includes a mains power supply module, a photovoltaic power supply module, and a power switching module. The information detection system includes a soil humidity sensor, a flow meter, an RS485-to-serial universal asynchronous receiver-transmitter (UART) module, an information acquisition microcontroller, and a narrowband internet of things (NB-IoT) wireless communication module. The valve drive and control system includes a touch screen, an RS232-to-serial UART module, a central microcontroller, an NB-IoT wireless communication module, and an optocoupler isolation relay. The remote monitoring center includes a server, a database, a mobile phone application, and a web application.

[0007] Further, the mains power supply module of the mains and photovoltaic complementary power supply system includes a switching power supply and a voltage reduction module. The switching power supply is electrically connected to the voltage reduction module. The switching power supply converts an AC220V voltage into a DC24V voltage, and supplies power to the touch screen. The electric valve, the optocoupler isolation relay, the soil humidity sensor, and the flow meter. The voltage reduction module converts the DC24V voltage into a DC5V voltage, and supplies power to the power switching module, the RS485-to-serial UART module, the RS232-to-serial UART module, the information acquisition microcontroller, the central microcontroller, and the NB-IoT wireless communication module.

[0008] Further, the photovoltaic power supply module of the mains and photovoltaic complementary power supply system includes a solar panel, a lithium battery, a solar charging controller, and a boost module. The solar panel, the lithium battery, and the boost module are electrically connected to the solar charging controller. ADC5VUSB interface is disposed on the solar charging controller and used to supply power to the power switching module, the RS485-to-serial UART module, the RS232-to-serial UART module, the information acquisition microcontroller, the central microcontroller, and the NB-IoT wireless communication module. The boost module is electrically connected to the solar charging controller, to convert a DC 12V voltage of the lithium battery into a DC24V voltage, and is used to supply power to the touch screen, the electric valve, the optocoupler isolation relay, the soil humidity sensor, and the flow meter.

[0009] Further, the power switching module of the mains and photovoltaic complementary power supply system includes a voltage detection module, a microcontroller unit (MCU), an intermediate relay, and a lithium battery charging module, and is used to detect a voltage of the lithium battery. When the voltage of the lithium battery is low, power supply by the photovoltaic power supply module is switched to power supply by the mains power supply module. In addition, the lithium battery charging module converts an AC220V voltage of the mains power supply module into a DC 12V voltage, to charge the lithium battery.

[0010] Further, the MCU microcontroller unit of the power switching module uses an STM32F103RCT6 microcontroller, the voltage detection module detects the voltage of the lithium battery and transmits the voltage of the lithium battery to the MCU. When the voltage of the lithium battery is low, the MCU control the intermediate relay to perform corresponding contact closing, to switch photovoltaic power supply to mains power supply.

[0011] Further, the soil humidity sensor of the information detection system uses a soil humidity sensor with an RS485 signal output mode. The flow meter uses an electromagnetic flow meter with an RS485 signal output mode, and has a liquid crystal display capable of displaying flow information in real time. The information acquisition microcontroller uses an STM32F103RCT6 microcontroller.

[0012] Further, the touch screen of the valve drive and control system uses a touch screen with a model of Samkoon AK070MG, and has functions of storing data and viewing historical data. The central microcontroller uses an STM32F103ZET6 microcontroller. The optocoupler isolation relay uses a DC24V power supply and is a 3.3V trigger signal optocoupler isolation relay.

[0013] Further, the electric valve uses an electric flange butterfly valve capable of feeding back a valve status signal.

[0014] Further, the valve drive and control system includes three modes, namely, a manual mode, an automatic mode, and an intelligent mode. In the manual mode, a farmer needs to determine, based on planting experience, whether irrigation needs to be performed, opens the electric valve on-site through the touch screen, or remotely opens the electric valve through the mobile phone application or the web application, and performs irrigation. In the automatic mode, there are two setting input boxes, namely, an irrigation time input box and an irrigation volume input box, and the farmer chooses one of the two setting input boxes, and performs irrigation based on a fixed irrigation time or a fixed irrigation volume. In the intelligent mode, irrigation water is intelligently adjusted based on acquired soil humidity information and irrigation water flow information and in combination with an irrigation control algorithm for the cotton field.

[0015] Further, the automatic mode of the water-saving irrigation system for a cotton field based on mains and photovoltaic complementary power supply includes the following steps.

[0016] SI: Acquire the soil humidity parameter of the cotton field by the soil humidity sensor.

[0017] S2: The central microcontroller determines whether the soil humidity parameter is lower than a preset minimum humidity threshold. If the soil humidity parameter is lower than the preset minimum humidity threshold, the central microcontroller controls a valve of the optocoupler isolation relay to enable contact closing.

[0018] S3: Open the electric valve to perform irrigation.

[0019] S4: During irrigation, the soil humidity sensor continuously acquires the soil humidity parameter of the cotton field. When the soil humidity parameter is higher than the preset maximum humidity threshold, the central microcontroller controls the valve of the optocoupler isolation relay to disable contact closing.

[0020] S5: Close the electric valve to complete irrigation.

[0021] Compared with the prior art, the present disclosure has the following beneficial effect.

[0022] 1. Power is supplied to the water-saving irrigation system for a cotton field through photovoltaic power supply. This greatly reduces power consumption. In addition, mains power supply is used. When the sunlight is insufficient for a long period of time and the voltage is low, mains power supply is provided. This effectively resolves a problem that the water-saving irrigation system for a cotton field does not work normally due to a low voltage of the lithium battery or another failure of photovoltaic power supply, so that operational reliability of the system is ensured.

[0023] 2. The soil humidity parameter and the irrigation water flow information are acquired through the information detection system, and the acquired data is transmitted to the touch screen and the remote monitoring center, to implement real-time monitoring of soil humidity and the irrigation water flow information of the cotton field. The historical data may be viewed through the touch screen and the remote monitoring center, to comprehensively use irrigation information.

[0024] 3 A NB-IoT wireless communication manner with low power consumption and a long transmission distance is used, so that stability of long-distance data transmission is ensured while power consumption of the system is reduced. A cellular network is used in the NB-IoT wireless communication manner, so that a base station needs not to be built. A communication connection to the server is established through a mobile base station, to complete data transmission and issuance of a valve control instruction by the remote monitoring center. This effectively saves costs and improves degree of automation of equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] To describe the technical solutions in embodiments of the present disclosure or in the prior art more clearly, the accompanying drawings required in the embodiments are briefly described below. Apparently, the accompanying drawings in the following description show merely some embodiments of the present disclosure, and other drawings can be derived from these accompanying drawings by those of ordinary skill in the art without creative efforts.

[0026] FIG. 1 is a schematic diagram of logic of a water-saving irrigation system for a cotton field based on mains and photovoltaic complementary power supply according to the present disclosure;

[0027] FIG. 2 is a schematic diagram of a mains and photovoltaic complementary power supply system of a water-saving irrigation system for a cotton field based on mains and photovoltaic complementary power supply according to the present disclosure;

[0028] FIG. 3 is a schematic diagram of an information detection system of a water-saving irrigation system for a cotton field based on mains and photovoltaic complementary power supply according to the present disclosure;

[0029] FIG. 4 is a schematic diagram of a valve drive and control system of a water-saving irrigation drive control system for a cotton field based on mains and photovoltaic complementary power supply according to the present disclosure;

[0030] FIG. 5 is a schematic diagram of a remote monitoring center of a water-saving irrigation system for a cotton field based on mains and photovoltaic complementary power supply according to the present disclosure.

[0031] Reference Numerals: 1: mains and photovoltaic complementary power supply system, 2: information detection system, 3: valve drive and control system, 4: electric valve, 5: remote monitoring center, 6: mains power supply module, 7: photovoltaic power supply module, 8: power switching module, 9: switching power supply, 10: voltage reduction module, 11: solar panel, 12: lithium battery, 13: solar charging controller, 14: boost module, 15: voltage detection module, 16: MCU microcontroller unit, 17: intermediate relay, 18: lithium battery charging module, 19; soil humidity sensor, 20: flow meter, 21: RS485-to-serial UART module, 22: information acquisition microcontroller, 23: NB-IoT wireless communication module, 24: touch screen, 25: RS232-to-serial UART module, 26: central microcontroller, 27: optocoupler isolation relay, 28: server, 29: database, 30: mobile phone application, 31: web application. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0032] The technical solutions of the embodiments of the present disclosure are clearly and completely described below with reference to the drawings in the embodiments of the present disclosure. Apparently, the described embodiments are merely a part rather than all of the embodiments of the present disclosure. All other embodiments obtained by those skilled in the art based on the embodiments of the present disclosure without creative efforts shall fall within the protection scope of the present disclosure.

[0033] As shown in FIG. 1 to FIG. 5, a water-saving irrigation system for a cotton field based on mains and photovoltaic complementary power supply includes a mains and photovoltaic complementary power supply system 1, an information detection system 2, a valve drive and control system 3, an electric valve 4, and a remote monitoring center 5. The mains and photovoltaic complementary power supply system 1 includes a mains power supply module 6, a photovoltaic power supply module 7, and a power switching module 8. The information detection system 2 includes a soil humidity sensor 19, a flow meter 20, an RS485-to-serial universal asynchronous receiver-transmitter (UART) module 21, an information acquisition microcontroller 22, and a narrowband internet of things (NB-IoT) wireless communication module 23. The valve drive and control system 3 includes a touch screen 24, an RS232-to-serial UART module 25, a central microcontroller 26, an NB-IoT wireless communication module 23, and an optocoupler isolation relay 27. The remote monitoring center 5 includes a server 28, a database 29, a mobile phone application 30, and a web application 31.

[0034] The mains power supply module 6 of the mains and photovoltaic complementary power supply system 1 includes a switching power supply 9 and a voltage reduction module 10. The switching power supply 9 is electrically connected to the voltage reduction module 10. The switching power supply 9 converts an AC220V voltage into a DC24V voltage, and supplies power to the touch screen 24, the electric valve 4, the optocoupler isolation relay 27, the soil humidity sensor 19, and the flow meter 20. The voltage reduction module 10 converts the DC24V voltage into a DC5V voltage, and supplies power to the power switching module 8, the RS485-to-serial UART module 21, the RS232-to-serial UART module 25, the information acquisition microcontroller 22, the central microcontroller 26, and the NB-IoT wireless communication module 23.

[0035] The photovoltaic power supply module 7 of the mains and photovoltaic complementary power supply system 1 includes a solar panel 11, a lithium battery 12, a solar charging controller 13, and a boost module 14. The solar panel 11, the lithium battery 12, and the boost module 14 are electrically connected to the solar charging controller 13. ADC5VUSB interface is disposed on the solar charging controller 13 and used to supply power to the power switching module 8, the RS485-to-serial UART module 21, the RS232-to-serial UART module 25, the information acquisition microcontroller 22, the central microcontroller 26, and the NB-IoT wireless communication module 23. The boost module 14 is electrically connected to the solar charging controller 13, to convert a DC 12V voltage of the lithium battery 12 into a DC24V voltage, and is used to supply power to the touch screen 24, the electric valve 4, the optocoupler isolation relay 27, the soil humidity sensor 19, and the flow meter 20.

[0036] The power switching module 8 of the mains and photovoltaic complementary power supply system 1 includes a voltage detection module 15, a microcontroller unit (MCU) 16, an intermediate relay 17, and a lithium battery charging module 18, and is used to detect a voltage of the lithium battery 12. When the voltage of the lithium battery 12 is low, power supply by the photovoltaic power supply module 7 is switched to power supply by the mains power supply module 6. In addition, the lithium battery charging module 18 converts an AC220V voltage of the mains power supply module 6 into a DC 12V voltage, to charge the lithium battery 12.

[0037] The MCU microcontroller unit 16 of the power switching module 8 uses an STM32F103RCT6 microcontroller, the voltage detection module 15 detects the voltage of the lithium battery 12 and transmits the voltage of the lithium battery 12 to the MCU 16. When the voltage of the lithium battery 12 is low, the MCU 16 controls the intermediate relay 17 to perform corresponding contact closing, to switch photovoltaic power supply to mains power supply.

[0038] The soil humidity sensor 19 of the information detection system 2 uses a soil humidity sensor 19 with an RS485 signal output mode. The flow meter 20 uses an electromagnetic flow meter with an RS485 signal output mode, and has a liquid crystal display capable of displaying flow information in real time. The information acquisition microcontroller 22 uses an STM32F103RCT6 microcontroller.

[0039] The touch screen 24 of the valve drive and control system 3 uses a touch screen with a model of Samkoon AK070MG, and has functions of storing data and viewing historical data. The central microcontroller 26 uses an STM32F103ZET6 microcontroller. The optocoupler isolation relay 27 uses a DC24V power supply and is a 3.3V trigger signal optocoupler isolation relay.

[0040] The electric valve 4 uses an electric flange butterfly valve capable of feeding back a valve status signal.

[0041] The valve drive and control system 3 includes three modes, namely, a manual mode, an automatic mode, and an intelligent mode. In the manual mode, a farmer needs to determine, based on planting experience, whether irrigation needs to be performed, opens the electric valve 4 on-site through the touch screen 24, or remotely opens the electric valve 4 through the mobile phone application 30 or the web application 31, and performs irrigation. In the automatic mode, there are two setting input boxes, namely, an irrigation time input box and an irrigation volume input box, and the farmer chooses one of the two setting input boxes, and performs irrigation based on a fixed irrigation time or a fixed irrigation volume; and in the intelligent mode, irrigation water is intelligently adjusted based on acquired soil humidity information and irrigation water flow information and in combination with an irrigation control algorithm for the cotton field.

[0042] The automatic mode of the water-saving irrigation system for a cotton field based on mains and photovoltaic complementary power supply includes the following steps.

[0043] SI: Acquire the soil humidity parameter of the cotton field by the soil humidity sensor 19.

[0044] S2: The central microcontroller 26 determines whether the soil humidity parameter is lower than the preset minimum humidity threshold. If the soil humidity parameter is lower than the preset minimum humidity threshold, the central microcontroller 26 controls the optocoupler isolation relay 27 to enable contact closing.

[0045] S3: Open the electric valve 4 to perform irrigation.

[0046] S4: During irrigation, the soil humidity sensor 19 continuously acquires the soil humidity parameter of the cotton field. When the soil humidity parameter is higher than the preset maximum humidity threshold, the central microcontroller 26 controls the optocoupler isolation relay 27 to disable contact closing.

[0047] S5: Close the electric valve 4 to complete irrigation.

[0048] Particular examples are used herein for illustration of principles and implementation modes of the present disclosure. The descriptions of the above embodiments are merely used for assisting in understanding the method of the present disclosure and its core ideas. In addition, those of ordinary skill in the art can make various modifications in terms of particular implementation modes and the scope of application in accordance with the ideas of the present disclosure. In conclusion, the content of the description shall not be construed as limitations to the present disclosure.

Claims

1. A water-saving irrigation system for a cotton field based on mains and photovoltaic complementary power supply, comprising a mains and photovoltaic complementary power supply system (1), an information detection system (2), a valve drive and control system (3), an electric valve (4), and a remote monitoring center (5), wherein the mains and photovoltaic complementary power supply system (1) comprises a mains power supply module (6), a photovoltaic power supply module (7), and a power switching module (8); the information detection system (2) comprises a soil humidity sensor (19), a flow meter (20), an RS485-to-serial universal asynchronous receiver-transmitter (UART) module (21), an information acquisition microcontroller (22), and a narrowband internet of things (NB-IoT) wireless communication module (23); the valve drive and control system (3) comprises a touch screen (24), an RS232-to-serial UART module (25), a central microcontroller (26), an NB-IoT wireless communication module (23), and an optocoupler isolation relay (27); and the remote monitoring center (5) comprises a server (28), a database (29), a mobile phone application (30), and a web application (31).

2. The water-saving irrigation system for a cotton field based on mains and photovoltaic complementary power supply according to claim 1, wherein the mains power supply module (6) of the mains and photovoltaic complementary power supply system (1) comprises a switching power supply (9) and a voltage reduction module (10); the switching power supply (9) is electrically connected to the voltage reduction module (10); the switching power supply (9) converts an AC220V voltage into a DC24V voltage, and supplies power to the touch screen (24), the electric valve (4), the optocoupler isolation relay (27), the soil humidity sensor (19), and the flow meter (20); and the voltage reduction module (10) converts the DC24V voltage into a DC5V voltage, and supplies power to the power switching module (8), the RS485-to-serial UART module (21), the RS232-to-serial UART module (25), the information acquisition microcontroller (22), the central microcontroller (26), and the NB-IoT wireless communication module (23).

3. The water-saving irrigation system for a cotton field based on mains and photovoltaic complementary power supply according to claim 1, wherein the photovoltaic power supply module (7) of the mains and photovoltaic complementary power supply system (1) comprises a solar panel (11), a lithium battery (12), a solar charging controller (13), and a boost module (14); the solar panel (11), the lithium battery (12), and the boost module (14) are electrically connected to the solar charging controller (13); a DC5V USB interface is disposed on the solar charging controller (13) and used to supply power to the power switching module (8), the RS485-to-serial UART module (21), theRS232-to-serial UART module (25), the information acquisition microcontroller (22), the central microcontroller (26), and the NB-IoT wireless communication module (23); and the boost module (14) is electrically connected to the solar charging controller (13), to convert a DC12V voltage of the lithium battery (12) into a DC24V voltage, and is used to supply power to the touch screen (24), the electric valve (4), the optocoupler isolation relay (27), the soil humidity sensor (19), and the flow meter (20).

4. The water-saving irrigation system for a cotton field based on mains and photovoltaic complementary power supply according to claim 3, wherein the power switching module (8) of the mains and photovoltaic complementary power supply system (1) comprises a voltage detection module (15), a microcontroller unit (MCU) (16), an intermediate relay (17), and a lithium battery charging module (18), and is used to detect a voltage of the lithium battery (12); when the voltage of the lithium battery (12) is low, power supply by the photovoltaic power supply module (7) is switched to power supply by the mains power supply module (6); and in addition, the lithium battery charging module (18) converts an AC220V voltage of the mains power supply module (6) into a DC12V voltage, to charge the lithium battery (12).

5. The water-saving irrigation system for a cotton field based on mains and photovoltaic complementary power supply according to claim 4, wherein the MCU microcontroller unit (16) of the power switching module (8) uses an STM32F103RCT6 microcontroller, the voltage detection module (15) detects the voltage of the lithium battery (12) and transmits the voltage of the lithium battery (12) to the MCU (16), and when the voltage of the lithium battery (12) is low, the MCU (16) controls the intermediate relay (17) to perform corresponding contact closing, to switch photovoltaic power supply to mains power supply.

6. The water-saving irrigation system for a cotton field based on mains and photovoltaic complementary power supply according to claim 1, wherein the soil humidity sensor (19) of the information detection system (2) uses a soil humidity sensor with an RS485 signal output mode; the flow meter (20) uses an electromagnetic flow meter with an RS485 signal output mode, and has a liquid crystal display capable of displaying flow information in real time; and the information acquisition microcontroller (22) uses an STM32F103RCT6 microcontroller.

7. The water-saving irrigation system for a cotton field based on mains and photovoltaic complementary power supply according to claim 1, wherein the touch screen (24) of the valve drive and control system (3) uses a touch screen with a model of Samkoon AK070MG, and has functionsof storing data and viewing historical data; the central microcontroller (26) uses an STM32F103ZET6 microcontroller; the optocoupler isolation relay (27) uses a DC24V power supply and is a 3.3V trigger signal optocoupler isolation relay.

8. The water-saving irrigation system for a cotton field based on mains and photovoltaic complementary power supply according to claim 1, wherein the electric valve (4) uses an electric flange butterfly valve capable of feeding back a valve status signal.

9. The water-saving irrigation system for a cotton field based on mains and photovoltaic complementary power supply according to claim 1, wherein the valve drive and control system (3) comprises three modes, namely, a manual mode, an automatic mode, and an intelligent mode; in the manual mode, a farmer needs to determine, based on planting experience, whether irrigation needs to be performed, opens the electric valve (4) on-site through the touch screen (24), or remotely opens the electric valve (4) through the mobile phone application (30) or the web application (31), and performs irrigation; in the automatic mode, there are two setting input boxes, namely, an irrigation time input box and an irrigation volume input box, and the farmer chooses one of the two setting input boxes, and performs irrigation based on a fixed irrigation time or a fixed irrigation volume; and in the intelligent mode, irrigation water is intelligently adjusted based on acquired soil humidity information and irrigation water flow information and in combination with an irrigation control algorithm for the cotton field.

10. The water-saving irrigation system for a cotton field based on mains and photovoltaic complementary power supply according to claim 9, wherein when the valve drive and control system (3) is in the automatic mode, a soil humidity parameter of the cotton field are acquired by the soil humidity sensor (19); the central microcontroller (26) determines whether the soil humidity parameter is lower than a preset minimum humidity threshold, if the soil humidity parameter is lower than the preset minimum humidity threshold, the central microcontroller (26) controls the optocoupler isolation relay (27) to enable contact closing; the electric valve (4) is opened to perform irrigation; and during irrigation, the soil humidity sensor (19) continuously acquires the soil humidity parameter of the cotton field, and when the soil humidity parameter is higher than a preset maximum humidity threshold, the central microcontroller (26) controls the optocoupler isolation relay (27) to disable contact closing; and the electric valve (4) is closed to complete irrigation.A. CLASSIFICATION OF SUBJECT MATTERA01G25 / 16(2006.01)i; H02J9 / 06(2006.01)i; H02J7 / 35(2006.01)i; A01G25 / 00(2006.01)i; G08C17 / 02(2006.01)iAccording to International Patent Classification (IPC) or to both national classification and IPCB. FIELDS SEARCHEDMinimum documentation searched (classification system followed by classification symbols) IPC: A01G,H02J,G08CDocumentation searched other than minimum documentation to the extent that such documents are included in the fields searchedElectronic data base consulted during the international search (name of data base and, where practicable, search terms used)CNABS; CNTXT; ENTXTC; CJFD; WFNPL; CNKI: Jttt, M « ft®,, I'M Wtf, MX, M'J, 1£M M NB-IoT. USTXT; EPTXT; GBTXT; WOTXT; ENTXT; VEN; DWPI; WPABS: solar energy, electric, electricity, valve, sensor, detect, measure, wireless communication, narrow-band, internet of things, NB-IoT.DOCUMENTS CONSIDERED TO BE RELEVANTCategory* Citation of document, with indication, where appropriate, of the relevant passages Relevant to claim No. PX CN 115836638 A (SHIHEZI UNIVERSITY et al.) 24 March 2023 (2023-03-24) claims 1-10, description, paragraphs 1-34, and figures 1-5 1-10 X CN 110488891 A (ZHANG WANJUN) 22 November 2019 (2019-11-22) description, paragraphs 71-140, and figures 1-3 1-10 Y ZV CN 107328441 A (BEIJING FORESTRY UNIVERSITY) 07 November 2017 (2017-11-07) description, paragraphs 41-120, and figures 1-3 1-10 X CN 208283815 U (LINZHOU CITY, HONG CHONG ENERGY TECHNOLOGY DEVELOPMENT CO., LTD.) 25 December 2018 (2018-12-25) description, paragraphs 20-37, and figures 1-5 1-10 X CN 213463289 U (YIBIN XIAOFENG AGRICULTURAL TECHNOLOGY CO., LTD.) 18 June 2021 (2021-06-18) description, paragraphs 28-44, and figures 1-4 1-10 A CN 108317290 A (BEIJING YOULIAN SHIKONG TECHNOLOGY CO., LTD.) 24 July 2018 (2018-07-24) entire document 1-10| | Further documents are listed in the continuation of Box C.annex.* Special categories of cited documents:“A” document defining the general state of the art which is not considered to be of particular relevance“D” document cited by the applicant in tire international application“E” earlier application orpatent but published on or after the international“T”“O”“P”filing datedocument which may throw doubts on priority claim(s) or which is cited to establish the publication date of another citation or other special reason (as specified)document referring to an oral disclosure, use, exhibition or other meansdocument published prior to the international filing date but later than the priority date claimed‘Y’later document published after the international filing date or priority date and not in conflict with the application but cited to understand the principle or theory underlying the inventiondocument of particular relevance; the claimed invention cannot be considered novel or cannot be considered to involve an inventive step when the document is taken alonedocument of particular relevance; the claimed invention cannot be considered to involve an inventive step when the document is combined with one or more other such documents, such combination being obvious to a person skilled in the artdocument member of the same patent familyDate of the actual completion of the international searchDate of mailing of the international search report17 March 202423 March 2024Name and mailing address of the ISA / CNChina National Intellectual Property Administration (ISA / CN)China No. 6, Xitucheng Road, Jimenqiao, Haidian District,Beijing 100088Authorized officerTelephone No.C. DOCUMENTS CONSIDERED TO BE RELEVANTCategory* Citation of document, with indication, where appropriate, of the relevant passages Relevant to claim No. A CN 208922092 U (CHINA UNIVERSITY OF GEOSCIENCES (WUHAN)) 31 May 2019 (2019-05-31) entire document 1-10 A US 2020107507 Al (TAIWAN SEMICONDUCTOR MANUFACTURING CO., LTD.) 09 April 2020 (2020-04-09) entire document 1-10 A CN 115104516 A (INSTITUTE OF AGRICULTURAL ECONOMICS AND INFORMATION, GANSU ACADEMY OF AGRICULTURAL SCIENCES) 27 September 2022 (2022-09-27) entire document 1-10 A CN 211558328 U (SHANGHAI URBAN CONSTRUCTION URBAN OPERATION (GROUP) CO., LTD.) 25 September 2020 (2020-09-25) entire document 1-10PCT / CN2023 / 141622Patent document cited in search report Publication date (day / month / year) Patent family member)s) Publication date (day / month / year) CN 115836638 A 24 March 2023 CN 219088046 U 30 May 2023 CN 110488891 A 22 November 2019 None CN 107328441 A 07 November 2017 None CN 208283815 U 25 December 2018 None CN 213463289 U 18 June 2021 None CN 108317290 A 24 July 2018 None CN 208922092 U 31 May 2019 CN 109324555 A 12 February 2019 US 2020107507 Al 09 April 2020 CN 110999765 A 14 April 2020 TW 202015518 A 01 May 2020 US 11058074 B2 13 July 2021 CN 115104516 A 27 September 2022 None CN 211558328 U 25 September 2020 None

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