Low-power-consumption wireless transmission plant stem flow monitoring device

Abstract

The invention relates to the technical field of monitoring devices, and provides a low-power-consumption wireless transmission plant stem flow monitoring device which comprises a shell, an electric feeding assembly and a main control board are arranged in the shell, a monitoring system is integrated on the main control board, a mounting bracket is slidably arranged in the shell and is in transmission connection with the electric feeding assembly, and a wireless transmission module is arranged in the mounting bracket. Two excitation motors are fixedly mounted on the mounting bracket, the probe array is fixedly mounted on the mounting bracket, the probe array comprises at least three functional probes, the vibration directions of the excitation motors are parallel to the axes of the functional probes, and the external environment detection module is fixedly mounted on the end surface of the shell. By arranging the slidable mounting bracket, the electric feeding assembly and the probe array, the radial and axial multi-point and multi-dimensional dynamic monitoring of the plant stem is realized, and the technical problems that the monitoring position cannot be flexibly adjusted and the coverage range is limited in the traditional fixed probe layout are solved.

Description

Technical Field

[0001] This invention relates to the field of monitoring device technology, and more specifically, to a low-power wireless transmission plant stem flow monitoring device. Background Technology

[0002] Plant stem flow is a key physiological indicator reflecting plant water absorption, transport and transpiration. Its accurate monitoring is of irreplaceable significance for precision irrigation in agriculture, hydrological cycle research in forest ecosystems, and assessment of vegetation drought resistance. With the development of Internet of Things technology, wireless transmission plant stem flow monitoring devices have become the mainstream direction of industry research and application because they can get rid of wire constraints and realize long-term automated monitoring in the field.

[0003] Currently, existing plant stem flow monitoring devices are mainly designed based on principles such as thermal pulse method and thermal diffusion method. Although they have basic stem flow monitoring and wireless transmission functions, there are still many technical bottlenecks in practical applications. The specific problems are as follows:

[0004] The probe layout is a fixed structure, which cannot flexibly switch the monitoring position and makes it difficult to achieve multi-dimensional and multi-point coverage monitoring of the stem, resulting in insufficient data comprehensiveness and accuracy. It also lacks an adaptive adjustment mechanism for plant types, and the monitoring parameters need to be manually configured according to the plant category, which is cumbersome and has poor adaptability.

[0005] Based on this, the present invention provides a low-power wireless transmission plant stem flow monitoring device to solve the technical problems mentioned in the background art. Summary of the Invention

[0006] To overcome the above-mentioned defects, embodiments of the present invention provide a low-power wireless transmission plant stem flow monitoring device, which solves the technical problem of a low-power wireless transmission plant stem flow monitoring device in related technologies / prior technologies.

[0007] According to one aspect, at least one embodiment of the present invention provides a low-power wireless transmission plant stem flow monitoring device, including a housing, which houses an electric feed assembly and a main control board, wherein a monitoring system is integrated on the main control board.

[0008] The mounting bracket is slidably disposed within the housing and is connected to the electric feed assembly for transmission. Two excitation motors are fixedly mounted on the mounting bracket.

[0009] A probe array, fixed on a mounting bracket, includes at least three functional probes, and the vibration direction of the excitation motor is parallel to the axis of the functional probes.

[0010] The external environment detection module is fixedly mounted on the end face of the housing;

[0011] Plant type identification probe, fixed on the housing;

[0012] The monitoring system is configured as follows:

[0013] The working state switching and parameter adjustment of each functional probe can be independently controlled. The working state includes at least temperature measurement state and heating state. The heating power and heating rate in the heating state can be independently programmed.

[0014] Control the sliding of the mounting bracket and periodically start the excitation motor.

[0015] As a preferred technical solution of the present invention, the number of functional probes is five, and the five functional probes are arranged linearly at equal intervals. Each functional probe includes a hollow probe tube, and a temperature measuring unit and a heating unit are alternately arranged on the hollow probe tube.

[0016] As a preferred embodiment of the present invention, the length of the hollow probe is 100-200mm, the length of the temperature measuring unit and the heating unit is 5-8mm, and the axial distance between adjacent temperature measuring units and heating units on the same hollow probe is 10-15mm.

[0017] As a preferred technical solution of the present invention, the electric feed assembly includes two ball screws rotatably connected in the housing and a servo motor fixed in the housing. A synchronous toothed belt is drivenly connected to the output shaft of the servo motor. Both ball screws are drivenly connected to the synchronous toothed belt and the mounting bracket. Two guide blocks are fixedly mounted on the mounting bracket. Guide grooves are provided in the housing at positions corresponding to the two guide blocks. The two guide blocks are slidably connected to the two guide grooves respectively. An encoder is integrated in the servo motor.

[0018] As a preferred technical solution of the present invention, the monitoring system includes a central controller, to which are connected:

[0019] The multi-channel signal conditioning and analog-to-digital conversion module is connected to the plant type identification probe and various temperature measurement units;

[0020] A multi-channel heating module is electrically connected to each heating unit.

[0021] The feed control module communicates with the encoder and is configured to periodically adjust the position of the mounting bracket;

[0022] The vibration control module communicates with two excitation motors.

[0023] A storage battery, on which a power distribution management module is installed;

[0024] The wireless data transmission module communicates with the multi-channel signal conditioning and analog-to-digital conversion module.

[0025] The mode switching module is configured to control the pairing of the heating unit and the temperature measuring unit across the hollow probe based on preset rules, and to obtain stem flow monitoring data at different monitoring points on the plant stem by alternately switching the position of the working heating unit in the hollow probe and the position of the working temperature measuring unit in the hollow probe. The preset rules include full coverage scanning rules, retest scanning rules and comparison verification rules.

[0026] The plant type measurement configuration matching library is configured to automatically call the corresponding preset rule and the preset temperature range of the heating unit when the preset rule is executed from the plant type measurement configuration matching library after the central controller receives the identification result of the plant type identification probe.

[0027] The low-power management module communicates with the central controller and the power distribution management module, and is configured to dynamically adjust the power supply mode of the power distribution management module.

[0028] As a preferred technical solution of the present invention, the external environment detection module includes a temperature and humidity probe and a light intensity sensor fixedly mounted on the end face of the housing, and the data terminals of the temperature and humidity probe and the light intensity sensor are both connected to the central controller.

[0029] As a preferred technical solution of the present invention, the full coverage scanning rule is configured as follows: to perform alternating coverage monitoring of all monitoring points on the plant stem and different positions along the axis of each hollow probe.

[0030] The retesting scanning rule is configured as follows: high-frequency repeated monitoring is performed on the preset key monitoring points and the axial target position of the hollow probe.

[0031] The comparison and verification rules are configured as follows: two independent monitoring channels containing different hollow probes and different combinations of axial positions of the hollow probes work synchronously and perform data comparison.

[0032] As a preferred technical solution of the present invention, the plant type identification probe is staggered with each functional probe, and a data cable is connected to the main control board.

[0033] As a preferred technical solution of the present invention, the temperature measuring unit includes a platinum resistance sensor and a package base. The platinum resistance sensor is fixed inside the package base, and its sensing end is exposed on the end face of the package base. The package base is embedded in the reserved mounting hole on the side wall of the hollow probe by interference fit, and a sealing adhesive layer is provided between the package base and the inner wall of the mounting hole.

[0034] The pins of the platinum resistance sensor are soldered with signal transmission lines, and the other end of the signal transmission lines is plugged into and connected to the signal interface of the multi-channel signal conditioning and analog-to-digital conversion module.

[0035] As a preferred technical solution of the present invention, the heating unit includes a heating wire, a ceramic base, a power supply lead, and a snap-on terminal block. The heating wire is spirally wound in the groove of the ceramic base and fixed by high-temperature ceramic adhesive. The ceramic base is embedded in the corresponding mounting groove on the side wall of the hollow probe. The exposed surface of the heating wire is flush with the sensing end of the temperature measuring unit and protrudes 0.3-0.5mm from the outer surface of the hollow probe. One end of the power supply lead is welded to both ends of the heating wire, and the other end of the power supply lead is snapped and fixed to the power supply interface of the multi-channel heating module through the snap-on terminal block.

[0036] The beneficial effects of this invention are as follows:

[0037] 1. This invention, by setting up a sliding mounting bracket, an electric feeding component, and a probe array, achieves multi-point, multi-dimensional dynamic monitoring of plant stems in the radial and axial directions. It solves the technical problems of traditional fixed probe layouts, which cannot flexibly adjust the monitoring position and have limited coverage. The probe array can move smoothly along the guide groove, and combined with the excitation motor to periodically eliminate contact gaps, the device can scan at different depths and circumferential positions according to a preset program to obtain more comprehensive and accurate stem flow spatial distribution data, significantly improving the comprehensiveness and reliability of monitoring, which is significantly different from the existing technology.

[0038] 2. This invention introduces a plant type identification probe and a plant type measurement configuration matching library, which realizes adaptive calling and intelligent configuration of monitoring parameters. After the device comes into contact with the plant, it automatically identifies the type of plant and calls the corresponding heating power, heating rate and monitoring rules. No manual intervention is required, which greatly reduces the complexity of operation and enhances the adaptability of the device to different plant species and the accuracy of monitoring.

[0039] 3. This invention constructs an intelligent system integrating three-dimensional monitoring and energy efficiency optimization through the linkage and collaboration of the mode switching module, the low-power management module, and various execution units. The three modes of full-coverage scanning, retest scanning, and comparative verification can be flexibly switched according to needs, and are coordinated with the electric feed drive depth adjustment to form a radial, axial, and circumferential three-dimensional scanning system. At the same time, the low-power management module dynamically adjusts the power supply status of each module, significantly extending the battery life while ensuring monitoring performance. The overall system demonstrates a high degree of integration and synergy in terms of multi-point coverage, adaptive configuration, and energy efficiency management, solving the problems of single function and low energy efficiency of existing devices, and has outstanding technological progress and industrial application prospects. Attached Figure Description

[0040] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments of the present invention will be briefly introduced below. Obviously, the drawings described below are merely some exemplary embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the content of the exemplary embodiments of the present invention and these drawings without any creative effort.

[0041] Figure 1 This is a schematic diagram of the structure of a low-power wireless transmission plant stem flow monitoring device according to the present invention;

[0042] Figure 2 A structural diagram of the main control board and mounting bracket;

[0043] Figure 3 for Figure 2 A magnified schematic diagram of the local structure at point A;

[0044] Figure 4 A schematic diagram of the central controller and multi-channel heating module;

[0045] Figure 5 This is a screenshot of the UI interface of the monitoring system.

[0046] In the diagram: 1. Housing; 2. Main control board; 3. Mounting bracket; 4. Vibration motor; 5. Functional probe; 6. Plant type identification probe; 7. Servo motor; 8. Guide block; 9. Temperature and humidity probe; 10. Light intensity sensor; 11. Central controller; 12. Multi-channel signal conditioning and analog-to-digital conversion module; 13. Multi-channel heating module; 14. Feed control module; 15. Vibration control module; 16. Battery; 17. Wireless data transmission module; 18. Mode switching module; 19. Plant type measurement configuration matching library; 20. Low power management module; 21. Data cable; 22. Ball screw; 501. Hollow probe tube; 502. Temperature measurement unit; 503. Heating unit. Detailed Implementation

[0047] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it.

[0048] To keep the drawings concise, each drawing only schematically shows the parts relevant to the invention; these do not represent the actual structure of the product. Furthermore, for ease of understanding, in some drawings, only one of components with the same structure or function is schematically shown, or only one is labeled. In this document, "one" not only means "only one," but can also mean "more than one," and "several" includes "two" and "more than two."

[0049] In this document, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0050] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0051] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of description and simplification of operation, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention.

[0052] Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0053] like Figures 1-5 As shown, it illustrates a low-power wireless transmission plant stem flow monitoring device according to an embodiment of the present invention, including a housing 1, which contains an electric feed component and a main control board 2. The main control board integrates a monitoring system, and a data cable 21 is connected to the main control board 2.

[0054] In use, the housing 1 is fixed to the plant to be tested by a strap, and the data cable 21 is connected to an external monitoring terminal.

[0055] Mounting bracket 3 is slidably disposed in housing 1 and connected to the electric feed assembly for transmission. Two excitation motors 4 are fixedly mounted on mounting bracket 3.

[0056] The electric feed assembly includes two ball screws 22 rotatably connected inside the housing 1 and a servo motor 7 fixed inside the housing 1. A synchronous toothed belt is driven to the output shaft of the servo motor 7. Both ball screws 22 are driven to the synchronous toothed belt and the mounting bracket 3. Two guide blocks 8 are fixedly mounted on the mounting bracket 3. Guide grooves are opened inside the housing 1 at the positions corresponding to the two guide blocks 8. The two guide blocks 8 are slidably connected to the two guide grooves respectively. An encoder is integrated inside the servo motor 7.

[0057] As the core actuator for adjusting the radial position of the probe array, the electric feed component's control logic is designed around periodically and precisely adjusting the insertion depth and expanding the dimensions of monitoring points. By working in conjunction with the core module of the monitoring system, it can achieve monitoring coverage of different radial depths of plant stems, thus overcoming the limitations of single-depth monitoring.

[0058] The central controller 11 serves as the control core. According to the preset program or external instructions, it sends depth adjustment instructions to the feed control module 14. After receiving the instructions, the feed control module 14 converts them into control signals for the servo motor 7. By controlling the operating state of the servo motor 7, it drives the synchronous toothed belt to transmit synchronously.

[0059] The synchronous toothed belt meshes with two ball screws 22, driving the two ball screws 22 to rotate synchronously. Since the mounting bracket 3 is threadedly connected to the ball screws 22, and the mounting bracket 3 slides with the guide groove in the housing 1 through the guide block 8, the rotation of the ball screws 22 is converted into a smooth linear motion of the mounting bracket 3 along the guide groove, which ultimately drives the probe array fixed on the mounting bracket 3 to move along its own axis, thereby adjusting the insertion depth into the plant.

[0060] The insertion depth adjustment period of the probe array can be programmed and set by the central controller 11, and is adapted to the measurement mode period of the mode switching module 18 by default.

[0061] For example, in the full-coverage scanning mode, the depth is adjusted once after each round of scanning, and in the key area retesting mode, the depth is adjusted once every 3 rounds of retesting. The cycle range supports adjustment from 1 to 24 hours to meet the time resolution requirements of different plant stem flow monitoring.

[0062] The insertion depth adjustment range is preset based on the plant stem diameter and probe length. Users can customize the adjustment range by sending commands through an external terminal to avoid excessive insertion that could damage the plant or probe.

[0063] The encoder integrated in the servo motor 7 collects the motor rotation angle and speed data in real time, converts them into the actual insertion depth data of the probe array, and feeds them back to the feed control module 14 and the central controller 11.

[0064] The central controller 11 compares the actual depth with the target depth and fine-tunes the operating parameters of the servo motor 7 through the feed control module 14.

[0065] The depth adjustment and mode switching module 18 of the electric feed component forms a three-dimensional monitoring point expansion system, and the two work together to achieve all-round monitoring coverage:

[0066] In full-coverage scanning mode, after each round of scanning between hollow probes 501 and the axial unit of hollow probes 501, the electric feed component drives the probe array to adjust the insertion depth once, such as from 5mm to 10mm. The next round of scanning then covers all hollow probes 501 and axial points at the new radial depth, forming a three-dimensional scan of radial depth, transverse direction of hollow probes 501, and axial direction of hollow probes 501, which greatly improves the comprehensiveness of the data.

[0067] In the key area retest mode, for the preset key hollow probe 501 and axial points, 2-3 target radial depths can be set simultaneously, and high-frequency retests can be carried out at each depth to verify the stability of stem flow data in key areas at different radial depths and enhance the reliability of the data.

[0068] In the comparative verification mode, two independent monitoring channels can correspond to different radial depths. By comparing the stem flow data at different depths, the radial distribution characteristics of stem flow can be determined, while further eliminating environmental interference or equipment errors at a single depth.

[0069] The probe array is fixed on the mounting bracket 3. The probe array includes at least three functional probes 5. The vibration direction of the excitation motor 4 is parallel to the axis of the functional probes 5.

[0070] In a preferred embodiment, the number of functional probes 5 is five, and the five functional probes 5 are arranged linearly at equal intervals. Each functional probe 5 includes a hollow probe tube 501, and a temperature measuring unit 502 and a heating unit 503 are alternately arrayed on the hollow probe tube 501.

[0071] The hollow probe 501 is 150mm long, the temperature measuring unit 502 and the heating unit 503 are both 7mm long, and the axial distance between adjacent temperature measuring units 502 and heating units 503 on the same hollow probe 501 is 12.5mm.

[0072] The external environment detection module is fixedly mounted on the end face of housing 1;

[0073] The external environment detection module includes a temperature and humidity probe 9 and a light intensity sensor 10 fixedly mounted on the end face of the housing 1. The data terminals of the temperature and humidity probe 9 and the light intensity sensor 10 are both connected to the central controller 11.

[0074] Plant type identification probe 6 is fixedly mounted on housing 1;

[0075] The plant type identification probe 6 is misaligned with each of the functional probes 5.

[0076] The temperature measuring unit 502 includes a platinum resistance sensor and a package. The platinum resistance sensor is fixed inside the package, and the sensing end of the platinum resistance sensor is exposed on the end face of the package. The package is embedded in the reserved mounting hole on the side wall of the hollow probe 501 by interference fit, and a sealing adhesive layer is provided between the package and the inner wall of the mounting hole.

[0077] The pins of the platinum resistance sensor are soldered with signal transmission lines, and the other end of the signal transmission lines is plugged into and plugged into the signal interface of the multi-channel signal conditioning and analog-to-digital conversion module 12.

[0078] The heating unit 503 includes a heating wire, a ceramic base, a power supply lead, and a snap-on terminal block. The heating wire is spirally wound in the groove of the ceramic base and fixed with high-temperature ceramic adhesive. The ceramic base is embedded in the corresponding mounting groove on the side wall of the hollow probe 501. The exposed surface of the heating wire is flush with the sensing end of the temperature measuring unit 502 and protrudes 0.3-0.5mm from the outer surface of the hollow probe 501. One end of the power supply lead is welded to both ends of the heating wire, and the other end of the power supply lead is snapped and fixed to the power supply interface of the multi-channel heating module 13 through the snap-on terminal block.

[0079] The monitoring system is configured as follows:

[0080] Each functional probe 5 can be independently controlled to switch its working state and adjust its parameters. The working states include at least temperature measurement state and heating state. The heating power and heating rate during the heating state can be programmed independently.

[0081] Control the sliding of the mounting bracket 3 and periodically start the excitation motor 4.

[0082] The monitoring system includes a central controller 11, to which are connected:

[0083] The multi-channel signal conditioning and analog-to-digital conversion module 12 is connected to the plant type identification probe 6 and each temperature measurement unit 502 for data transmission.

[0084] The multi-channel heating module 13 is electrically connected to each heating unit 503;

[0085] The feed control module 14 communicates with the encoder and is configured to periodically adjust the position of the mounting bracket 3;

[0086] Vibration control module 15 communicates with two excitation motors 4;

[0087] Battery 16, on which a power distribution management module is installed;

[0088] The wireless data transmission module 17 is communicatively connected to the multi-channel signal conditioning and analog-to-digital conversion module 12;

[0089] The mode switching module 18 is configured to control the pairing of the heating unit 503 and the temperature measuring unit 502 across the hollow probe 501 based on preset rules, and to obtain stem flow monitoring data at different monitoring points on the plant stem by alternately switching the position of the working heating unit 503 in the hollow probe 501 and the position of the working temperature measuring unit 502 in the hollow probe 501.

[0090] The preset rules include full-coverage scanning rules, retest scanning rules, and comparison verification rules.

[0091] The full-coverage scanning rule is configured as follows: all monitoring points on the plant stem and different axial positions of each hollow probe 501 are monitored in turn;

[0092] In a preferred embodiment, after the full coverage scanning rule is activated, the monitoring system first obtains the category information of the target plant through the plant category identification probe, and then calls the corresponding preset parameters such as heating power and heating rate from the plant type measurement configuration matching library 19.

[0093] Subsequently, the electric feed assembly is controlled to drive the mounting bracket 3 to move along the guide rail, so that the probe array covers the radial monitoring range of the plant stem. At the same time, the excitation motor 4 is periodically started to eliminate the contact gap between the functional probe 5 and the stem surface.

[0094] The mode switching module 18 controls the electric heating unit 503 on each hollow probe 501 to pair with the temperature measuring unit 502 across the sleeve in a preset order, thereby activating different hollow probes 501 and electric heating units 503 at different axial positions in sequence, and the corresponding temperature measuring unit 502 synchronously collects local temperature change data of the stem.

[0095] The external environment parameter detection module collects and uploads temperature, humidity, and illuminance data in real time.

[0096] After all data is processed by the multi-channel signal conditioning and analog-to-digital conversion module, it is temporarily stored by the wireless data transmission module 17 until the mounting bracket 3 completes all radial position traversal, and all hollow probes 501 complete heating and temperature measurement cycles at different axial positions, so as to achieve blind-spot-free coverage monitoring of the plant stem in the full radial range and multi-dimensional axial direction.

[0097] The re-testing scanning rule is configured as follows: high-frequency repeated monitoring is performed on the preset key monitoring points and the axial target position of the hollow probe 501;

[0098] In a preferred embodiment, the working logic of the retest scanning rule is to perform high-frequency, time-series focused measurements on preset key monitoring locations or areas where data anomalies are found, in order to capture details of stem flow dynamic changes or verify the stability of the data.

[0099] Its workflow is based on preset rules or triggered by real-time analysis;

[0100] The monitoring system first identifies one or more specific locations that need to be monitored based on historical data, plant physiological models, or user settings. For example, a specific combination of radial depth and circumferential angle. After the process is started, the monitoring system controls the electric feed component to quickly position the probe array to the first key location.

[0101] At this location, the monitoring system continuously performs multiple complete measurement cycles of heating, temperature measurement, and recording at a significantly higher frequency than in full-coverage mode, forming a high-density time-series data cluster for that location;

[0102] After completing the intensive retest of the current point, if there are multiple key points, the electric feed component will sequentially position itself to the next point and perform the same high-frequency measurement.

[0103] Throughout the retesting process, the monitoring system can temporarily suspend routine scanning of non-key areas and concentrate resources to ensure the acquisition of key data;

[0104] The high time-resolution data generated by this process is particularly suitable for studying the response of stem flow to instantaneous environmental changes such as sudden changes in light, or for diagnostic repeat observation of areas suspected of having abnormal cambium activity or vascular blockage.

[0105] The comparison and verification rules are configured as follows: two independent monitoring channels containing different hollow probes 501 and different combinations of axial positions of hollow probes (501) work synchronously and the data are compared.

[0106] In a preferred embodiment, after the comparison verification rule is activated, the mode switching module 18 selects two combinations from the probe array containing different hollow probe tubes 501 and different axial positions to form two independent and non-overlapping monitoring channels. Each channel contains a complete electric heating unit 503 paired with a temperature measuring unit 502.

[0107] The monitoring system controls the electric feed assembly to position the mounting bracket 3 to the target monitoring area, and the two excitation motors 4 start synchronously to ensure that the functional probes 5 of the two channels are in the same contact state with the stem.

[0108] Subsequently, the two channels simultaneously start the electric heating unit 503 according to the same heating power, heating rate, heat preservation time and other parameters. The corresponding temperature measuring unit 502 collects stem temperature response data in the same time dimension. The environmental data collected by the external environment parameter detection module is synchronously distributed to the two channels as a correction benchmark.

[0109] The central controller 11 receives the processed data from two channels after signal conditioning and analog-to-digital conversion, calculates the deviation between the two sets of data, and if the deviation is within a preset threshold, takes the average value of the two sets of data as the effective stem flow data.

[0110] If the deviation exceeds the threshold, the automatic control mounting bracket 3 will fine-tune its position, and the excitation motor 4 will recalibrate the contact state. Then, the two sets of channels will synchronously execute the monitoring process again until the deviation meets the requirements. By comparing the two channels synchronously, the influence of factors such as contact error and environmental interference will be eliminated, thereby improving the reliability and accuracy of the monitoring data.

[0111] The plant type measurement configuration matching library 19 is configured to automatically call the corresponding preset rule and the preset temperature range of the heating unit 503 when the preset rule is executed from the plant type measurement configuration matching library 19 after the central controller 11 receives the recognition result of the plant type identification probe 6.

[0112] The plant type identification probe 6 distinguishes plant species based on the inherent physical or electrical characteristics of the plant stem. It is staggered from the functional probe 5 to avoid signal interference generated by the functional probe 5 during heating and vibration, thus ensuring the purity of the collected data.

[0113] The plant type identification probe 6 collects characteristic parameters by directly contacting the plant stem. The obtained analog signal is filtered, amplified and converted into a digital signal that can be recognized by the central controller 11 after being processed by the multi-channel signal conditioning and analog-to-digital conversion module 12.

[0114] The low-power management module 20 is communicatively connected to the central controller 11 and the power distribution management module, and is configured to dynamically adjust the power supply mode of the power distribution management module.

[0115] The low-power management module 20 focuses on dynamically adapting to the device's operating status and optimizing power distribution. It achieves low-power control through real-time communication with the central controller 11 and the power distribution management module.

[0116] The low-power management module 20 receives real-time feedback from the central controller 11 on the device's operating status, including the current monitoring mode, probe insertion depth adjustment status, data transmission status, and standby status. At the same time, it obtains the remaining power data of the battery 16 uploaded by the power distribution management module and dynamically adjusts the power supply mode based on a preset power optimization algorithm.

[0117] In full-coverage scanning mode, power is supplied only to the currently working heating unit 503, temperature measuring unit 502, electric feed component and wireless transmission module as needed, and non-working modules are in low-power sleep mode.

[0118] In the retest scanning mode, power supply resources are concentrated on the functional modules corresponding to key monitoring points, reducing the power supply frequency and power of modules in non-key areas;

[0119] In the comparative verification mode, only the core modules of the two independent monitoring channels are powered, while the power consumption of other redundant modules is reduced simultaneously.

[0120] During the data transmission phase, the power supply of the wireless data transmission module 17 is briefly increased to ensure fast data upload, and the power consumption is immediately restored after the transmission is completed.

[0121] When the device is in standby or has no monitoring tasks, the power distribution management module cuts off the power supply to non-core modules, retaining only the minimum maintenance power of the central controller 11. At the same time, it dynamically adjusts the power supply priority according to the battery 16 power level. When the power is insufficient, it prioritizes the protection of core functions such as plant type identification and key data storage. Through the above dynamic adjustment throughout the entire process, the power is used efficiently, significantly extending the device's battery life.

[0122] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A low-power wireless transmission plant stem flow monitoring device, characterized in that, Includes a housing (1), which contains an electric feed assembly and a main control board (2), and the main control board integrates a monitoring system; The mounting bracket (3) is slidably disposed in the housing (1) and connected to the electric feed assembly. Two vibration motors (4) are fixedly mounted on the mounting bracket (3). The probe array is fixed on the mounting bracket (3), and the probe array includes at least three functional probes (5). The vibration direction of the excitation motor (4) is parallel to the axis of the functional probes (5). An external environment detection module is fixedly mounted on the end face of the housing (1); Plant type identification probe (6) is fixed on the housing (1); The monitoring system is configured as follows: The working state switching and parameter adjustment of each of the functional probes (5) can be independently controlled. The working state includes at least temperature measurement state and heating state. The heating power and heating rate in the heating state can be independently programmed. Control the sliding of the mounting bracket (3) and periodically start the excitation motor (4).

2. The low-power wireless transmission plant stem flow monitoring device according to claim 1, characterized in that, The number of functional probes (5) is five, and the five functional probes (5) are arranged in a linear and equally spaced manner. Each functional probe (5) includes a hollow probe tube (501), and a temperature measuring unit (502) and a heating unit (503) are alternately arranged on the hollow probe tube (501).

3. The low-power wireless transmission plant stem flow monitoring device according to claim 2, characterized in that, The hollow probe (501) has a length of 100-200mm, the temperature measuring unit (502) and the heating unit (503) have a length of 5-8mm, and the axial distance between adjacent temperature measuring units (502) and heating units (503) on the same hollow probe (501) is 10-15mm.

4. The low-power wireless transmission plant stem flow monitoring device according to claim 1, characterized in that, The electric feed assembly includes two ball screws (22) rotatably connected in the housing (1) and a servo motor (7) fixed in the housing (1). A synchronous toothed belt is driven on the output shaft of the servo motor (7). Both ball screws (22) are driven to the synchronous toothed belt and the mounting bracket (3). Two guide blocks (8) are fixed on the mounting bracket (3). Guide grooves are provided in the housing (1) at the positions corresponding to the two guide blocks (8). The two guide blocks (8) are slidably connected to the two guide grooves respectively. An encoder is integrated in the servo motor (7).

5. The low-power wireless transmission plant stem flow monitoring device according to claim 4, characterized in that, The monitoring system includes a central controller (11), which is connected to: The multi-channel signal conditioning and analog-to-digital conversion module (12) is connected to the plant type identification probe (6) and each temperature measurement unit (502) for data connection; A multi-channel heating module (13) is electrically connected to each heating unit (503); The feed control module (14) communicates with the encoder and is configured to periodically adjust the position of the mounting bracket (3); The vibration control module (15) communicates with the two excitation motors (4); A storage battery (16) on which a power distribution management module is installed; The wireless data transmission module (17) is communicatively connected to the multi-channel signal conditioning and analog-to-digital conversion module (12); The mode switching module (18) is configured to control the pairing of the heating unit (503) and the temperature measuring unit (502) across the hollow probe (501) based on preset rules, and to obtain stem flow monitoring data at different monitoring points on the plant stem by alternately switching the position of the working heating unit (503) in the hollow probe (501) and the position of the working temperature measuring unit (502) in the hollow probe (501). The preset rules include full coverage scanning rules, retest scanning rules and comparison verification rules. The plant type measurement configuration matching library (19) is configured to automatically call the corresponding preset rule and the preset temperature range of the heating unit (503) when the preset rule is executed from the plant type measurement configuration matching library (19) after the central controller (11) receives the recognition result of the plant type identification probe (6); The low-power management module (20) is connected in communication with the central controller (11) and the power distribution management module, and is configured to dynamically adjust the power supply mode of the power distribution management module.

6. The low-power wireless transmission plant stem flow monitoring device according to claim 5, characterized in that, The external environment detection module includes a temperature and humidity probe (9) and a light intensity sensor (10) fixed on the end face of the housing (1). The data terminals of the temperature and humidity probe (9) and the light intensity sensor (10) are both connected to the central controller (11).

7. The low-power wireless transmission plant stem flow monitoring device according to claim 6, characterized in that: The full coverage scanning rule is configured as follows: all monitoring points on the plant stem and different axial positions of each hollow probe (501) are monitored in turn; The retesting scanning rule is configured as follows: high-frequency repeated monitoring is performed on the preset key monitoring points and the axial target position of the hollow probe (501); The comparison and verification rules are configured as follows: two independent monitoring channels containing different hollow probes (501) and different combinations of axial positions of hollow probes (501) work synchronously and perform data comparison.

8. The low-power wireless transmission plant stem flow monitoring device according to claim 1, characterized in that, The plant type identification probe (6) is staggered with each functional probe (5), and a data cable (21) is connected to the main control board (2).

9. A low-power wireless transmission plant stem flow monitoring device according to claim 7, characterized in that, The temperature measuring unit (502) includes a platinum resistance sensor and a package base. The platinum resistance sensor is fixed inside the package base, and its sensing end is exposed on the end face of the package base. The package base is embedded in the reserved mounting hole on the side wall of the hollow probe (501) by interference fit, and a sealing adhesive layer is provided between the package base and the inner wall of the mounting hole. The pins of the platinum resistance sensor are soldered with signal transmission lines, and the other end of the signal transmission lines is plugged into and connected to the signal interface of the multi-channel signal conditioning and analog-to-digital conversion module (12).

10. A low-power wireless transmission plant stem flow monitoring device according to claim 9, characterized in that, The heating unit (503) includes a heating wire, a ceramic base, a power supply lead, and a snap-on terminal block. The heating wire is spirally wound in the groove of the ceramic base and fixed with high-temperature ceramic adhesive. The ceramic base is embedded in the corresponding mounting groove on the side wall of the hollow probe (501). The exposed surface of the heating wire is flush with the sensing end of the temperature measuring unit (502) and protrudes 0.3-0.5mm from the outer surface of the hollow probe (501). One end of the power supply lead is welded to both ends of the heating wire, and the other end of the power supply lead is snapped and fixed to the power supply interface of the multi-channel heating module (13) through a snap-on terminal block.

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