CN114200978A

CN114200978A - Greenhouse monitoring system

Info

Publication number: CN114200978A
Application number: CN202111529175.8A
Authority: CN
Inventors: 王斌; 徐晓轩; 李强; 梁菁; 王浩
Original assignee: Nankai University
Current assignee: Nankai University
Priority date: 2021-08-04
Filing date: 2021-12-14
Publication date: 2022-03-18
Anticipated expiration: 2041-12-14
Also published as: CN114200978B

Abstract

A system for monitoring plant growth and a greenhouse, comprising: a sensing unit 100 including a growth environment measurement sensor module 120, a camera module 130; the sensing unit 100 and the camera module 130 transmit the monitored growth environment information and the photographed image to the wireless communication module 140; the wireless communication module 140 transmits the growth environment information and the image data to the micro control unit 150 for processing; a measurement sensor module 200; for measuring the strain of the ceiling of the greenhouse and providing the intensity or wavelength of the reflected light reflected from the greenhouse and providing an alarm device. The sensing unit 100 comprises an ultraviolet light sensor for providing a "flat" ultraviolet absorption peak.

Description

Greenhouse monitoring system

Technical Field

The present invention relates to a greenhouse monitoring system, and more particularly, to a system for monitoring the growth of plants growing in a greenhouse, automatically setting a cultivation environment, and providing monitoring data to a portable terminal.

Background

Crops grown in greenhouses are subject to temperature, humidity, solar radiation and atmospheric conditions, which affect crop growth and growth rate, and in turn, crop size, yield, etc. Therefore, the crop yield can be predicted through environmental information such as temperature, humidity, radiation and atmospheric conditions and crop growth condition information, and the predicted yield can be used for predicting the crop price and the crop import and export quantity. The prior art uses the human eye as a means of observing crop growth and growth rate to more accurately estimate crop growth observations and yield from weather changes, but this method has no way of accurately measuring these data from moment to moment.

The absorption of ultraviolet light, among other things, is a major factor affecting crop growth, whereas the core components of current ultraviolet detectors: the absorption crystal also has the problem of inconsistent absorption in certain wave bands, which causes inaccurate detection of ultraviolet absorption.

Further, there is no technique for accurately monitoring the loss of property due to heavy snow, collapse of a house, and the like. The existing detectors also lack optical detectors for house deformations that are specific for greenhouses. The existing pressure detector is bulky and is not suitable for being installed in a greenhouse environment, for example, the existing pressure detector is arranged at the top position and can block sunlight due to the bulky volume; or because the simple optical sensor is too sensitive, the situation of false alarm such as alarm can occur under the condition of rain and the like. Therefore, it is urgently needed to develop a light and flexible optical detector which is convenient to install and is specially used for detecting the deformation of a greenhouse caused by snowing.

Disclosure of Invention

The problem to be solved by the invention is to provide a greenhouse monitoring system capable of monitoring plant growth in a greenhouse and a greenhouse ceiling. In order to solve the problems described above, the present invention provides a system for monitoring growth and greenhouse conditions. The method comprises the following steps: a sensing unit 100 including a growth environment measurement sensor module 120, a camera module 130; wherein the growing environment measuring sensor module 120 in the sensing unit 100 includes a temperature/humidity sensor, a light sensor and/or a carbon dioxide sensor, etc. for monitoring growing environment information of plant growth in real time; the camera module 130 captures an image of a plant or a cultivation environment to generate a captured image; the sensing unit 100 and the camera module 130 transmit the monitored growth environment information and the photographed image to the wireless communication module 140;

the wireless communication module 140 transmits the growth environment information and the image data to the micro control unit 150 for processing;

a micro control unit 150; the micro control unit 150 includes a control unit, a communication interface unit, and an environment control unit; the communication interface unit is used for receiving information and data transmitted by the wireless communication module 140; the micro control unit 150 is configured to process the information and data to obtain an instruction for controlling plant growth; the environment control unit performs control intervention on plant growth based on the instruction;

a measurement sensor module 200; for measuring the strain of the ceiling of the greenhouse and providing the intensity or wavelength of the reflected light reflected from the greenhouse and providing an alarm device.

Preferably, wherein the light sensor is an ultraviolet light sensor.

Preferably, wherein the strain gauge sensor module 150 is arranged at a fixed position on the floor of the greenhouse or detachably arranged at a floor position.

Another aspect of the present invention is to provide an ultraviolet light sensor, which comprises a positioning and focusing module 1, a filtering module 2, a converter module 3, a photoelectric converter 4 and an electrical signal processing and indicating unit 5 in sequence; wherein the converter module is a corundum single crystal 3;

the corundum monocrystal 3 comprises doping elements, wherein the doping elements comprise chromium (Cr), titanium (Ti), manganese (Mn), copper (Cu), iron (Fe), cobalt (Co) and zinc (Zn); wherein the mass percentages of the doping elements are shown in the following table:

another aspect of the present invention is to provide a method for measuring the amount of snow accumulated on a ceiling of a greenhouse, the method comprising using a measuring sensor module 200; the measuring sensor module 200 is arranged on the ground of the greenhouse and emits radiation to the ceiling, the measuring sensor module 200 receives reflected radiation after the emitted radiation is incident on the ceiling, so as to measure the strain of the greenhouse ceiling and provide an alarm device for the intensity and/or wavelength of the reflected radiation; when the measuring sensor module 200 measures the reflected light to be less than the reference intensity, it is determined that snow is accumulated on the ceiling of the greenhouse, and the alarm device sends an alarm signal to the portable terminal.

The system also includes a deformation measuring sensor module that provides light to the greenhouse ceiling and the intensity of reflected light reflected from the greenhouse ceiling is measured by the sensor module. The control unit may include an alarm unit for measuring a degree of deformation of the greenhouse ceiling using the reflected light input from the deformation degree measuring sensor module, and may transmit an alarm to the portable terminal when the greenhouse ceiling is deformed. The alarm unit may determine that snow is accumulated on the ceiling of the greenhouse when the intensity of the reflected light is greater than the intensity of the reflected light input at the previous time or greater than a preset reference value. The alarm unit may measure the greenhouse ceiling and the moving distance by using the wavelength of the reflected light, and determine that snow is accumulated on the greenhouse ceiling when the distance is less than a reference distance. In a greenhouse monitoring system according to an embodiment of the invention.

If the sensing unit of the present invention is installed in a mobile body, it receives the growing environment of plants while moving in the greenhouse, and can automatically perform appropriate operations. In addition, the greenhouse monitoring system according to the embodiment of the invention can remotely move the sensing unit, capture images of the desired plants in real time, and provide growth image information about the desired plants.

In addition, the greenhouse monitoring system according to the embodiment of the present invention can measure the degree of deformation of the greenhouse ceiling, and prevent the risk of the greenhouse collapsing by providing an alarm to the portable terminal in advance when snow accumulates outside.

The invention is characterized by the following aspects but not limited to the following aspects:

1) the invention comprehensively utilizes various environmental parameters in the greenhouse which can be detected by various sensors in real time, thereby guiding the control system to make corresponding decisions for guaranteeing the growth of plants. Thereby ensuring the growth of the plants in time. In addition, the growth condition of each plant can be monitored, so that the plants with poor growth can be screened out and subjected to subsequent treatment. In the prior art, data acquisition is usually carried out in a manual mode, and the method is low in efficiency and cannot be timely and effective. It may also cause omissions for parts of plants that do not grow well. The sensors adopted by the invention cover a temperature sensor, a humidity sensor, a brightness sensor, a carbon dioxide measuring sensor and the like, and also comprise an ultraviolet light sensor which is a sensor less used in temperature environment detection, and the ultraviolet light sensor is used together with the brightness sensor, so that the defect that the plant growth is influenced by only observing the light intensity of sunlight in the prior art is overcome. Because certain wave bands, especially ultraviolet light bands, have large influence factors on the growth of partial plants.

2) The invention is optimized for the sensor of the ultraviolet light section. In order to obtain the plant absorption spectrum data of the ultraviolet light wave band, the core elements of the detector are as follows: the composition of the single crystal is optimized, the impurities of the crystal are newly proportioned, and experiments show that the ultraviolet absorption spectrum under each wavelength after proportioning is relatively flat and no obvious absorption peak appears. Therefore, the ultraviolet detector prepared on the basis can meet the requirement of ultraviolet absorption spectrum detection in a greenhouse environment.

3) The sensor device for early warning the risk of greenhouse collapse caused by the accumulated snow on the greenhouse top is designed aiming at the special environment of the greenhouse, the device is ingenious in arrangement position, and can monitor the stress deformation of the greenhouse top caused by the accumulated snow on the greenhouse top under the condition that the lighting is not influenced, so that the general safety of the greenhouse is improved. The sensor module may be used in conjunction with the temperature monitoring systems previously described, which is not a simple technical means to stack. For example, in combination with a sensor in the ultraviolet range. In winter, the ultraviolet light irradiation is strong, the signal accumulation of the ultraviolet light section recorded every day is strong, the information can be fed back to a sensor for snow early warning, or the measurement accuracy is manually adjusted, or the threshold value for measuring stress alarm is automatically adjusted, so that the combined effect of the ultraviolet light irradiation and the snow early warning is exerted.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It is to be understood that the drawings in the following description are merely exemplary of some embodiments of the invention. For a person skilled in the art, without inventive effort, further figures can be obtained from these figures.

FIG. 1 shows a frame diagram 1 of a greenhouse monitoring system according to an embodiment of the invention;

FIG. 2 shows a frame of a greenhouse monitoring system according to an embodiment of the invention FIG. 2;

FIG. 3 shows an absorption spectrum of a single crystal for an ultraviolet light detector employed in the prior art;

FIG. 4 shows an absorption spectrum of a single crystal for an ultraviolet light detector employed in the present invention;

FIG. 5 shows a schematic diagram of an ultraviolet sensor structure employed in the present invention;

FIG. 6-a shows a schematic view of a strain gauge sensor module detecting moisture ceiling snow 1;

fig. 6-b shows a schematic view of a strain gauge sensor module detecting moisture ceiling snow 2.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. It is to be understood that the described embodiments are merely a few embodiments of the invention, and not all embodiments. All other embodiments, which can be obtained by a person skilled in the art without inventive effort based on the embodiments of the present invention, are within the scope of the present invention.

It is to be noted that the terms "comprises" and "comprising" and any variations thereof in the embodiments and drawings of the present invention are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or inherent to such process, method, article, or apparatus.

Hereinafter, the description of the present invention with reference to the drawings is not limited to the specific embodiments, and various changes may be applied and various embodiments may be adopted. It should be understood that the following description is intended to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the present invention.

In the following description, the terms first, second, etc. are used to describe various components, and are not limited in their meanings, and are used only for the purpose of distinguishing one component from another component. Like reference numerals are used throughout the specification to refer to like elements.

The system comprises a sensing unit 100, a growth environment measurement sensor module 120, a camera module 130, a wireless communication module 140, a micro control unit 150, a measurement sensor module 200, a control unit, a communication interface unit and an environment control unit.

Hereinafter, an embodiment of the present invention will be described in detail with reference to fig. 1 to 2.

As shown in fig. 1-2, a greenhouse monitoring system according to an embodiment of the present invention monitors not only the growth of plants growing in a greenhouse, but also the degree of deformation of the greenhouse ceiling. Thereby, growth environment information including temperature, humidity, irradiation amount, atmospheric state and plant growth image inside the greenhouse where the plant is grown can be detected and provided to the portable terminal. Furthermore, by monitoring the deformation of the greenhouse ceiling on which the plants are growing, the risk of collapse of the greenhouse due to external weather conditions can be detected in advance. Specifically, the greenhouse monitoring system may include a sensing unit 100, a control unit 200, and a portable terminal 300. The sensing unit 100 may detect growth environment information including plants in the greenhouse.

The sensing unit 100 may be mounted on a mobile body and may move along a rail provided in the greenhouse. The portable terminal 300 may include a mobile terminal using a mobile communication network such as a smart phone or a mobile phone, or a mobile terminal equipped with a data communication module such as a WiFi module. The portable terminal 300 may be connected to the control unit 200 through wireless communication to receive plant growth environment information or image data in real time. In addition, the portable terminal 300 may receive an alarm signal provided by the control unit 200. The control unit 200 may store data input from the sensing unit 100, and may control the greenhouse using the data. The control unit 200 may generate image data by matching a photographing position of a camera module included in the sensing unit 100 with a photographed image.

The control unit 200 receives a change of the greenhouse ceiling inputted from the sensing unit 100, compares the change with a pre-stored reference value, and generates an alarm when the comparison result exceeds the reference value. The control unit 200 may control the switch a, the water pump b, the fluid supplier c, etc. using data input from the sensing unit 100. The controller 200 may control the peripheral device by a signal of opening/closing the window by the switch a. When the temperature input from the sensing unit 100 does not match the set temperature, the cold/warm fan is activated. In addition, when the sensing unit 100 does not match the set humidity when the humidity is input, the control unit 200 may generate and operate a signal to operate the irrigation pump b. The controller 200 compares the light emission intensity of the incident light input from the sensing unit 100 with a preset light emission intensity to generate a signal for activating the light blocking device when the light emission intensity is out of a set range. The control unit 200 may convert an image input from the sensing unit 100 and provide the converted image to the portable terminal 300. At this time, the control unit 200 compares the input image with the stored image to determine the state of the plant, and may provide it to the portable terminal 300. The controller 200 may be a server. As described above, the greenhouse monitoring system according to the embodiment of the present invention can automatically control the plant growing environment and can confirm the state of the plant growing in the photographed image. The apparatus may include a growth environment measurement sensor module 110, a camera module 120, a wireless communication module 130, a micro control unit 140 and a strain measurement sensor module 150. Specifically, the growth environment measurement sensor module 110 may include at least one of a temperature sensor, a humidity sensor, a brightness sensor, and a carbon dioxide measurement sensor. The growing environment measuring sensor module 110 may measure temperature, humidity, solar radiation amount, carbon dioxide concentration, etc., among factors that may affect the growth of plants in real time, and transmit the result to the control unit 200. The temperature sensor may be a thermocouple, a temperature measuring resistor, a thermistor, a metal thermometer, or the like. The temperature sensor may be a sensor using ultrasonic waves or optical fibers, or the like.

The humidity sensor may be a sensor for detecting humidity using various phenomena (physical/chemical phenomena) related to moisture in the air. Such as, but not limited to, sensors that absorb changes in resistance or capacitance caused by porous ceramic or polymer membranes, such as dry hygrometers, hair hygrometers, lithium chloride humidity sensors, and the like. The light intensity sensor is a sensor that measures the amount of input light. The light intensity sensor may be a photoconductive sensor that conducts light upon incidence.

The sensor can be an ultraviolet sensor, and the core material sensitive to the ultraviolet band of the sensor sensitive to the ultraviolet band is a converter, and the converter can be a single crystal, in particular a doped single crystal, and is used for light absorption of the ultraviolet band. The impurities in the single crystal may include chromium (Cr).

In a device comprising a focusing and filtering unit, a converter and a photoelectric converter connected to an electrical signal processing and indicating unit, the converter being a corundum single crystal comprising chromium (Cr) as an impurity, titanium (Ti), manganese (Mn), iron (Fe), zinc (Zn) and copper (Cu), according to the invention the corundum single crystal further comprises cobalt (Co) as an impurity in the following atomic percentages by mass of the elements:

TABLE 1

Doping element	Content (mass percentage)
		Cr	0.017
Ti	0.032
		Mn	0.006
Cu	0.006
		Fe	0.010
Co	0.011
		Zn	0.014

It can be seen from FIG. 3 that the absorption peak from 300-400nm is not "flat" and the absorption extremum occurs around 350 nm. Such single crystal crystals cause difficulty in detection accuracy when the detector is manufactured. According to the ultraviolet absorption characteristics of the existing corundum single crystal, the content of each element of the impurity is adjusted, so that a 'flat' absorption peak can be generated in an ultraviolet band, and the preparation of a high-accuracy detector from the single crystal is facilitated. The mass percentages of the impurity element atoms are as follows:

TABLE 2

Doping element	Content (mass percentage)
		Cr	0.027
Ti	0.011
		Mn	0.001
Cu	0.013
		Fe	0.006
Co	0.021
		Zn	0.020

It can be seen from FIG. 4 that the absorption peak from 300-400nm is relatively "flat" compared to the plot, and no significant absorption extrema occur. Therefore, the doped single crystal can generate relative average absorption value in the ultraviolet band interval. This will facilitate the fabrication of single crystal crystals into highly accurate detectors.

From the above characteristics, it is shown that the increased incorporation of cobalt (Co) and copper (Cu) impurities in the impurities, as well as the variation in the percentage of other impurities, allows the spectral sensitivity of the receiver to be extended and improved.

The structure of the claimed uv sensor is shown in fig. 5. The device comprises a positioning focus (1) and a filtering block (2), wherein the converter is a corundum single crystal (3), and impurities contain chromium (Cr), titanium (Ti), manganese (Mn), copper (Cu), iron (Fe), cobalt (Co), zinc (Zn) and a photoelectric converter (4) which are connected with an electric signal processing and indicating unit (5). The working principle of the device is as follows. The incident radiation is guided through a focusing and filtering unit to a corundum single crystal containing the following impurities Cr, Ti, Mn, Cu, Fe, Co, Zn. The fluorescence emitted by the converter in the visible spectral range becomes more intense due to the broader absorption spectrum and higher intensity. This luminescence is converted into a more powerful electrical signal by a photoelectric converter. The latter being registered by the processing unit of the electrical signal and its indication.

The carbon dioxide measuring sensor is a sensor for measuring the concentration of carbon dioxide in air. It can be determined whether the carbon dioxide measuring sensor maintains an optimal carbon dioxide concentration at which photosynthesis of the plant can smoothly occur.

The camera module 120 captures a cultivation environment image. The camera module 120 may be a CCD or CMOS camera and may include an omnidirectional surveillance camera including left, right, up and down and zoom functions.

As shown in fig. 6-a, b, the strain gauge sensor module 150 measures the change in height ax of the greenhouse ceiling. This height variation is due to the snow pressure on the greenhouse ceiling causing a certain pressure. The strain gauge sensor module 150 may be placed in a fixed position on the floor of the greenhouse or removably placed in a floor location. The arrangement in this position can avoid blocking the sunlight required by the growth of the plants. The deformation degree measuring sensor module 150 may measure the height variation of the ceiling using a laser or a sound wave. For example, the deformation degree measuring sensor module 150 may include a sensor having a light source and a light receiving unit. The light emitted from the light source receives the light reflected from the greenhouse ceiling at the light receiving unit and transmits the received value to the control unit 200. Here, the light source may be an LED or a short wavelength laser light source, which is installed at the bottom area of the greenhouse (see fig.), at a position where the blocking of sunlight can be minimized compared to the prior art. The photoelectric conversion element may be used as a light receiving portion. At this time, the deformation degree measuring sensor module 150 may detect the wavelength or intensity of the reflected light to measure the deformation degree Δ x of the greenhouse ceiling (as shown in fig. 6-b), and transmit the detected wavelength or intensity to the control unit 200. Here, the deformation degree measuring sensor module 150 may periodically measure the deformation degree of the ceiling at predetermined time intervals, transmit the deformation degree to the micro control unit 140, or receive a remote signal transmitted from the portable terminal 300.

In particular, as shown in FIG. 6-a: the deformation degree measuring sensor module 150 may be provided with at least two light sources and light receiving units to measure the degree of deformation of both sides of the ceiling of the greenhouse. The deformation degree measuring sensor module 150 irradiates a light source to the lower surface of the greenhouse ceiling and receives reflected light reflected from the greenhouse ceiling. At this time, when snow does not fall outside the ceiling of the greenhouse, the intensity of reflected light has a small value. In contrast, when snow falls on the greenhouse ceiling, the intensity of reflected light is greater than when snow does not fall on the greenhouse ceiling. The intensity of the reflected light thus measured is transmitted to the controller 200. Furthermore, the wavelength of the reflected light reflected from the greenhouse ceiling is measured and transmitted to the control unit 200. When the greenhouse ceiling is partly deformed, the wavelength of the reflected light is measured and transmitted to the control unit 200. The micro control unit 140 refers to a dedicated processor for controlling a specific system and serves as a control hub of the sensing unit. More specifically, functions for processing or modifying various information input through the growth environment measurement sensor module 110. The micro control unit 140 generates image data by combining the photographing position of the camera module 120 and the photographed image. At this time, the photographing position of the camera module 120 may be a recognition sensor, Wifi, bluetooth, etc. installed on a track in the greenhouse. It should be understood that the uv light sensor of the present invention can also be used as a complement to the deformation degree measuring sensor module 150 for monitoring uv light changes, thereby also assisting in obtaining the snow degree of the greenhouse ceiling.

The sensing unit 100 includes a wireless communication module 130 that wirelessly transmits growth environment information or image data to the controller 200. The wireless communication module 130 includes a Wifi communication module, but is not necessarily limited thereto. The sensing unit 100 according to the embodiment of the present invention is mounted on the moving body 430. That is, the sensor module 110, the camera module 120, the micro control unit 140 or the wireless communication module 130 may be mounted on a mobile body. The moving body may be installed to move along a rail installed in the moving body. The guide rail may be an I-shaped long frame or the like, and serves as a moving path of the moving body. At least one rail may be provided in the longitudinal direction of the greenhouse, or there may be a plurality of rails.

The control unit 200 may include a communication interface unit, an environment control unit, an image data processing unit, a storage unit, and an alarm unit. Specifically, the communication interface receives the growth environment information and the image data information transmitted from the sensing unit 100 in real time. Wired communication is possible but preferably wireless communication is used. A detailed description of wireless communication will be omitted. The environment control unit 200 generates a control signal for controlling temperature, humidity, incident light intensity or carbon dioxide concentration by using the growth environment information sensed by the sensor.

The sensor module 110 sends a control signal to each device. The environmental control unit 220 generates signals for controlling the switches a, irrigation pumps b, fluid pipes c, etc., which are connected to the control unit 200. For example, if the temperature does not match the preset in terms of temperature, the peripheral device is controlled by (a) opening/closing a window through a switch or by generating a signal to activate a cold/warm fan. In addition, automatic control of generating and activating a signal for operating the irrigation pump b even when the humidity does not match, or generating a signal for activating the light shielding film when the intensity of incident light exceeds a set range. Are possible. The image data processing unit 230 determines a plant in which the growth abnormality has occurred. When plants grow abnormally, the color of the leaf surface changes or discolors. In addition, visually recognizable abnormalities may occur, such as sudden changes in the shape of the leaf or contractions. The image data processing unit compares the accumulated image data with image data generated by the current photographing to determine whether the shape of the leaf is suddenly changed through various algorithms.

To allow a situation such as a change in the state improvement to be photographed in more detail, the image data processing unit controls the camera module 120 in the sensing unit 100 to selectively enlarge and reduce the image photographing picture. Meanwhile, the motion of the moving object on which the camera module 120 is mounted may be controlled by the image data processing unit. The storage unit stores information about temperature, humidity, light intensity or input carbon dioxide concentration. A user, and stores the image data. When a plant is cultivated, an optimum temperature, humidity, light intensity or carbon dioxide concentration for cultivation is input and stored in the storage unit. The growth environment information input from the sensing unit 100 in real time is transmitted to the control unit 200. The control unit 200 determines whether the growth environment information is within an optimal temperature, humidity, light intensity or carbon dioxide concentration range stored in the storage unit. The image data stored in the storage unit is stored in the image data processing unit to be used as reference data for searching for a plant exhibiting an abnormal growth pattern. In addition, the storage unit may store deformation information of the ceiling collected by the deformation degree measurement sensor module 150. The alarm unit may calculate the degree of deformation of the greenhouse ceiling using the signal input from the deformation degree measuring sensor module.

At this time, when the intensity of the reflected light is greater than a reference value, the alarm unit determines that snow is accumulated. Thereafter, the distance between the moving body and the ceiling of the greenhouse can be calculated using the wavelength of light input from the deformation degree measurement sensor module 150. At this time, the alarm unit compares the moving body and a reference distance value between the moving bodies. Greenhouse ceilings measure the degree of deformation. At this time, the reference distance value is stored in the storage unit, and the reference distance value may be a distance value using the wavelength of light received on a. Clear days or distance values using previously received light wavelengths.

When the measured distance value is less than the reference distance value, the alarm unit recognizes that the deformation occurs, and may transmit an alarm signal to the portable terminal 300. Meanwhile, the alarm unit generates an alarm signal as described above, and thus the alarm unit can recognize the operation of the light shielding film in the portable terminal 300, and can transmit the signal at the same time. As described above, in the greenhouse monitoring system according to the embodiment of the present invention, the sensing unit is installed in the mobile body, and when the environment for plant growth is received to move in the greenhouse, an appropriate operation can be automatically performed. In addition, the greenhouse monitoring system according to the embodiment of the invention can remotely move the sensing unit, capture the required plants in real time and provide information about the required plants. In addition, the greenhouse monitoring system according to the embodiment of the present invention can measure the degree of deformation of the greenhouse ceiling, and prevent the risk of the greenhouse collapsing by providing an alarm to the portable terminal in advance when snow accumulates outside.

The above device embodiment corresponds to the method embodiment, and has the same technical effect as the method embodiment, and for the specific description, refer to the method embodiment. The device embodiment is obtained based on the method embodiment, and for specific description, reference may be made to the method embodiment section, which is not described herein again.

Those of ordinary skill in the art will understand that: the figures are merely schematic representations of one embodiment, and the blocks or flow diagrams in the figures are not necessarily required to practice the present invention.

Those of ordinary skill in the art will understand that: modules in the devices in the embodiments may be distributed in the devices in the embodiments according to the description of the embodiments, or may be located in one or more devices different from the embodiments with corresponding changes. The modules of the above embodiments may be combined into one module, or further split into multiple sub-modules.

Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims

1. A greenhouse system for monitoring plant growth, comprising:

a sensing unit (100) comprising a growth environment measurement sensor module (120), a camera module (130); wherein the growing environment measuring sensor module (120) in the sensing unit (100) comprises a temperature/humidity sensor, a light sensor and/or a carbon dioxide sensor and the like, and is used for monitoring growing environment information of plant growth in real time; the camera module (130) shoots a plant environment image to generate a shot image; the sensing unit (100) and the camera module (130) transmit the monitored growth environment information and the photographed image to a wireless communication module (140);

the wireless communication module (140) transmits the growth environment information and the shot image data to a micro control unit (150) for processing;

the micro control unit (150) comprises a control unit, a communication interface unit and an environment control unit; the communication interface unit is used for receiving the information and data transmitted by the wireless communication module (140); the micro control unit (150) is used for processing the information and the data to obtain an instruction for controlling the growth of the plant; the environment control unit performs control intervention on plant growth based on the instruction;

a measurement sensor module (200); for measuring the strain of the ceiling of the greenhouse and providing the intensity or wavelength of the reflected light reflected from the greenhouse and an alarm device for alarming.

2. The device of claim 1, wherein the light sensor is an ultraviolet light sensor.

3. The device according to claims 1-2, wherein the strain measurement sensor module (150) is arranged at a fixed position or detachably arranged at a ground position of the ground of the greenhouse.

4. An ultraviolet light sensor comprises a positioning focusing module (1), a filtering module (2), a converter module (3), a photoelectric converter (4) and an electric signal processing and indicating unit (5) in turn according to an optical path sequence; wherein the converter module is a corundum monocrystal (3);

the corundum monocrystal (3) comprises doping elements, wherein the doping elements comprise chromium (Cr), titanium (Ti), manganese (Mn), copper (Cu), iron (Fe), cobalt (Co) and zinc (Zn); wherein the mass percentages of the doping elements are shown in the following table:

。

5. A method for measuring the amount of snow accumulated on a greenhouse ceiling, the method comprising using a measuring sensor module (200); the measuring sensor module (200) is arranged on the ground of the greenhouse and emits radiation to the ceiling, and the measuring sensor module (200) receives reflected radiation after the emitted radiation is incident on the ceiling, so as to measure the strain of the greenhouse ceiling and provide an alarm device for the intensity and/or wavelength of the reflected radiation; when the measurement sensor module (200) measures that the reflected light is less than the reference intensity, it is determined that snow is accumulated on the ceiling of the greenhouse, and the alarm device sends an alarm signal to the portable terminal.