CN210690405U - High-endurance wireless sensor for measuring plant LAI data - Google Patents

Abstract

The utility model discloses a high endurance type wireless sensor for measuring plant LAI data, which comprises a power supply unit, a detection unit, a control unit and a radio frequency communication unit; the control unit respectively with the power supply unit the detecting element the radio frequency communication unit electric connection, the power supply unit still is connected with the plant, the power supply unit is arranged in gathering the bioelectricity in the plant, and utilizes the bioelectricity to the control unit power supply, the utility model provides a wireless sensor can utilize the bioenergy to supply power to the body, and can improve because the current moment shines the unstable condition of wireless sensor power supply that causes of reasons such as sunlight, no wind, when utilizing the plant bioelectricity power supply, can also use the difference of the shared proportion of solar spectrum different wave band light in the scattered light to approximate measurement light transmittance, and the light transmittance who detects through the detecting element is worth the LAI data of plant.

Description

High-endurance wireless sensor for measuring plant LAI data

Technical Field

The utility model belongs to the technical field of wireless sensing device, concretely relates to high continuation of journey type wireless sensor for measuring plant LAI data.

Background

The wireless sensor network node is formed by encapsulating the components of the wireless sensor in a shell, and the network is formed by randomly distributed micro nodes integrated with the sensor, the data processing unit and the communication module in a self-organizing way.

The conventional wireless sensor devices are powered by solar energy, wind energy, thermal energy and the like, and the designs are generally influenced by limited communication distance or cost, and in addition, the natural energy is poor in usability and extremely unstable, so that the wireless sensor devices cannot be continuously and stably powered, and continuous monitoring cannot be realized, and therefore, a high-endurance wireless sensor for measuring plant LAI data is provided.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a high continuation of journey type wireless sensor for measuring plant LAI data to solve the problem that proposes in the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: a high-endurance wireless sensor for measuring plant LAI data comprises a power supply unit, a detection unit, a control unit and a radio frequency communication unit; the control unit is respectively connected with the power supply unit, the detection unit and the radio frequency communication unit, the power supply unit is further connected with the plant, the power supply unit is used for collecting bioelectricity in the plant and supplying power to the control unit by utilizing the bioelectricity, the control unit is used for acquiring the light transmittance value of the detection unit and obtaining LAI data of the plant according to the light transmittance value of the detection unit, the detection unit is connected with the plant, and the control unit is further used for converting the LAI data into an electric signal and controlling the radio frequency communication unit to send the electric signal.

Furthermore, the power supply unit comprises an acquisition unit, an energy storage capacitor and a voltage converter; the collection unit comprises at least two collection needles, and is used for collecting bioelectricity in the plant, wherein the collection needles are inserted into the plant as electrodes.

Furthermore, the collection unit still with energy storage capacitor electric connection, voltage converter's input with the collection unit is connected, voltage converter's output with energy storage capacitor connects, energy storage capacitor is used for the storage the biological electricity that the collection unit gathered to this biological electricity that can gather in the plant through the collection unit, and send the biological electricity of gathering to energy storage capacitor and save, be ready for the power supply needs.

Further, the detection unit comprises a PAR detection sensor, and the PAR detection sensor is connected with the signal adjusting circuit; the PAR monitoring sensor is used for indirectly sensing the transmittance of solar rays, the attenuation of received direct solar rays in the canopy accords with the Beer-Lambert law when the sensors under the canopy are vertically and upwardly observed, and the direct light transmittance can be approximately measured by using the difference of the proportions of different bands of solar spectrum light in scattered light.

Further, the wireless sensor further comprises a temperature detector, the temperature detector is connected with the control unit, the temperature detector is used for detecting temperature, and the control unit is used for acquiring temperature data detected by the temperature detector. Therefore, the growth condition of the plant can be detected, and the change of the growth environment of the plant can also be detected.

Compared with the prior art, the beneficial effects of the utility model are that:

the utility model provides a high continuation of journey type wireless sensor for measuring plant LAI data can utilize the biological energy to supply power to the body, and can improve because the present moment can not shine sunlight, the unstable condition of wireless sensor power supply that causes such as no wind, when utilizing the plant bioelectricity power supply, can also use the difference of the shared proportion of solar spectrum different wave band light in the scattered light to come approximate measurement direct light transmittance, and the light transmittance value that detects through the detecting element is worth the LAI data of plant.

Drawings

Fig. 1 is a diagram of a distribution of wireless sensor units according to the present invention;

FIG. 2 is a schematic structural diagram of the detecting unit of the present invention;

in the figure: 10-a wireless sensor; 100-a power supply unit; 200-a detection unit; 300-a control unit; 400-radio frequency communication unit.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1, the present embodiment provides a wireless sensor 10, and the wireless sensor 10 is used for connecting with a plant. On the one hand, the plant may be used as a power supply plant to supply bioelectricity to the wireless sensor 10, on the other hand, the plant may be used as a measurement object, the wireless sensor 10 may measure LAI data of the plant, and the control unit 300 is connected to the power supply unit 100, the detection unit 200, and the radio frequency communication unit 400, respectively.

In this embodiment, it is preferable that the power supply unit 100 is connected to the plant as a device for collecting bioelectricity, the power supply unit 100 may be in the shape of a plate, a strip, or a claw, and the power supply unit 100 is provided with an electrode which is directly contacted with the plant to obtain bioelectricity in the plant. The specific shape of the power supply unit 100 should not be construed as a limitation to the present application as long as it can collect and store bioelectricity, and the power supply unit 100 may collect bioelectricity in a plant and supply power to the control unit 300 using the bioelectricity. The bioelectricity collected by the power supply unit 100 can also be used for supplying power to the detection unit 200 and the radio frequency communication unit 400.

In this embodiment, preferably, the control unit 300 may acquire the light transmittance value of the detection unit 200, and obtain LAI data of the plant according to the light transmittance value of the detection unit 200, wherein the detection unit 200 is a device for detecting environmental data, and may be connected to the plant. If the environmental data to be detected further includes temperature and humidity data, the wireless sensor 10 may further include a temperature detector for detecting temperature and a humidity sensor for detecting humidity, and the control unit 300 is further configured to convert the environmental data into an electrical signal and control the radio frequency communication unit 400 to send the electrical signal. The environmental data processed by the control unit 300 may be LAI data of plants, temperature data detected by a temperature detector, or humidity data detected by a humidity sensor.

In this embodiment, preferably, the radio frequency communication unit 400 may be communicatively connected to an external electronic device, and the radio frequency communication unit 400 may send data to the outside according to a set switching frequency. The external electronic device may receive the data transmitted by the radio frequency communication unit 400.

The wireless sensor 10 is powered by bioelectricity in the plant to detect environmental data in the case of the bioelectricity, and wirelessly transmits the detected environmental data through the radio frequency communication unit 400 in the wireless sensor 10. The wireless sensor 10 can be continuously and stably powered, and can be powered by a plurality of power supply modes, and besides real-time power supply by using biological energy, the wireless sensor 10 can also comprise a standby battery which is used for storing standby electric energy.

In this embodiment, preferably, the power supply unit 100 includes a collection unit and an energy storage capacitor, the collection unit may be directly connected to the plant for collecting bioelectricity in the plant, and the collection unit is further connected to the energy storage capacitor. The energy storage capacitor is used for storing the bioelectricity collected by the collecting unit, and is needed for power supply, and can provide working energy when the wireless sensor 10 works, wherein the energy storage capacitor can be a super capacitor, the super capacitor is also called an electrochemical capacitor, a double electric layer capacitor, a gold capacitor and a farad capacitor, and is an electrochemical element for storing energy through polarized electrolyte, the service life of the power supply unit 100 can be prolonged by adopting the super capacitor as the energy storage capacitor of the wireless sensor 10, and the collecting unit comprises at least two collecting needles, for example, 2 and 4. When a plurality of collecting needles are arranged, the collecting needles can be divided into two groups, the two groups of collecting needles are respectively used as a positive electrode needle and a negative electrode needle to collect bioelectricity in plants, one collecting needle is made of copper materials, the other collecting needle is made of zinc materials, the collecting needle made of copper materials is used as a positive electrode, the collecting needle made of zinc materials is used as a negative electrode, and the two collecting needles are inserted into the plants to collect the bioelectricity in the plants.

In order to prevent the collection needle from falling off, the collection needle can be arranged into a shovel shape or a barb shape. If the shovel-shaped collecting needle is adopted, a groove or a through hole can be formed in the middle of the collecting needle, and the collecting needle can be fixed in an oblique inserting mode from top to bottom when being inserted into a plant so as to prevent the collecting needle from falling off.

In this embodiment, preferably, the power supply unit 100 may further include a voltage converter, where the voltage converter may be a step-up/step-down DC-DC converter, and the DC-DC converter is a power management chip with high efficiency, and may be used to both step-up and step-down, output effective voltage according to input voltage through the voltage converter, and enable the energy storage capacitor to smoothly receive energy to be stored; if the copper electrode needle and the zinc electrode needle are used as the acquisition units, when the copper electrode needle and the zinc electrode needle are inserted into plants, the biological energy can be converted into electric energy through the DC-DC converter, and the converted voltage is stored in the super capacitor; the voltage stored in the super capacitor is then converted into a stable voltage by the linear voltage regulator, and the stable voltage of 2.4V, 3.6V and 5V can be output.

As shown in fig. 2, transmittance monitoring is performed by using three types of PAR sensors (red, blue and green), light passes through a bandpass filter to ensure that light entering the sensor is mainly direct light to the maximum extent, and the measured transmittance of the canopy is approximately equal to the direct light transmittance. And measuring to obtain the average light intensity above the canopy, marking as B, and the average light intensity below the canopy, marking as A, and substituting the recorded data into the following formula to obtain LAI data.

In this embodiment, it is preferable that the signal detected by the detection unit 200 may not change significantly enough, and an amplifier needs to be provided to amplify the signal detected by the detection unit 200. In one embodiment, the detection unit 200 is connected to an amplifier, which is connected to the control unit 300. The amplifier amplifies the signal detected by the detection unit 200 and transmits the amplified signal to the control unit 300. After receiving the signal output by the amplifier, the control unit 300 may perform data conversion or calculation on the received signal to obtain an electrical signal carrying detection data, and then the control unit 300 controls the radio frequency communication unit 400 to wirelessly transmit the electrical signal carrying detection data, so that an external electronic device wirelessly connected to the radio frequency communication unit 400 can receive the detection data. In one example, the radio frequency communication unit 400 implements serial communication using a wireless communication chip, and transmits data at intervals. The wireless communication chip may be, but is not limited to, SX 1278.

In this embodiment, it is preferable that a person skilled in the art can set a signal enhancement device at the front end of the radio frequency communication unit 400 according to actual needs to enhance the signal emission intensity, and the wireless sensor 10 may further include a temperature detector, and the temperature detector is connected to the control unit 300. The temperature detector is used for detecting temperature, and the control unit 300 is used for acquiring temperature data detected by the temperature detector and controlling the radio frequency communication unit 400 to transmit the detected temperature data, so that an external electronic device wirelessly connected with the radio frequency communication unit 400 can receive the detected data.

In this embodiment, the control unit 300 may be any one of a Digital Signal Processor (DSP), a Programmable Gate Array (FPGA), and a single chip microcomputer. In consideration of the factors such as volume and power consumption, in this embodiment, the control unit 300 may be a single chip, and the single chip calculates and converts data and controls the radio frequency communication unit 400 to transmit data. In one example, a single chip microcomputer with ultra-low power consumption is used for controlling other devices, for example, single chip microcomputers of models MSP430F5438A, STM8L101, STM32L0 and the like can be used.

A sensor network can be formed by a plurality of the wireless sensors 10, each wireless sensor 10 in the sensor network can be used as a network node, and external electronic devices can acquire data collected by the network nodes, and the external electronic devices can be devices which can be connected with the network and have operation processing capability, such as servers, personal computers, mobile devices, and the like.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (5)

1. A high endurance, wireless sensor for measuring plant LAI data, comprising: the device comprises a power supply unit, a detection unit, a control unit and a radio frequency communication unit; the control unit is electrically connected with the power supply unit, the detection unit and the radio frequency communication unit respectively.

2. The high endurance, wireless sensor for measuring plant LAI data, of claim 1, wherein: the power supply unit comprises an acquisition unit, an energy storage capacitor and a voltage converter; the acquisition unit comprises at least two acquisition needles, and the acquisition needles are electrically connected to the acquisition electrodes of the acquisition unit.

3. The high endurance, wireless sensor for measuring plant LAI data, of claim 2, wherein: the acquisition unit is further electrically connected with the energy storage capacitor, the input end of the voltage converter is connected with the acquisition unit, and the output end of the voltage converter is connected with the energy storage capacitor.

4. The high endurance, wireless sensor for measuring plant LAI data, of claim 1, wherein: the detection unit comprises a PAR detection sensor which is connected with the signal adjusting circuit; the signal adjusting circuit is connected with the control unit and the power supply unit.

5. The high endurance, wireless sensor for measuring plant LAI data, of claim 2, wherein: the wireless sensor further comprises a temperature detector, and the temperature detector is connected with the control unit.

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