Granary temperature and humidity monitoring device
By installing multiple monitoring pipelines and temperature and humidity fiber grating sensors inside the granary, a monitoring network is formed, which solves the problem of limited monitoring range in the existing technology, real-time temperature and humidity monitoring of different locations in the granary is achieved, and management accuracy is enhanced.
Patent Information
- Application Number
- CN202421961125.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-14
- Publication Date
- 2025-05-16
- Estimated Expiration
- 2034-08-14
AI Technical Summary
The existing granary temperature and humidity monitoring technology has the problem of limited monitoring range and prone to blind spots, and it is impossible to achieve comprehensive and effective monitoring.
A device that includes installing multiple monitoring pipelines and temperature and humidity fiber grating sensors inside the granary is adopted. These sensors form a monitoring network to monitor the temperature and humidity at different locations in the granary in real time.
Real-time temperature and humidity monitoring of different locations in the granary is realized, which enhances the comprehensiveness and effectiveness of monitoring, and facilitates operators to manage accurately.
Smart Images
Figure CN222882056U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of granary monitoring technology, and in particular to a granary temperature and humidity monitoring device. Background Art
[0002] In the grain storage industry, it is known that humidity seriously affects the safe storage of grain. Generally, it is safe to store grain at a humidity of 70%-75%, and its internal moisture is 13%-13.5%. When grain is in safe storage, its internal moisture content is generally less than 12%. When grain is damp and its internal moisture increases to more than 20%, the metabolism of grain is accelerated, and respiratory heat is continuously generated, which increases the local grain temperature, and satisfies the conditions for grain germination, which will inevitably cause grain heating and mildew, and it is very easy to produce a cyclic reaction. If you want to reduce the loss of grain, you must maintain appropriate humidity and moisture in balance with it. At present, domestic granaries mainly use cables to measure temperature. Cable measurement has problems such as large measurement errors, low sensitivity, and high failure rate. Its accuracy and reliability need to be improved; using humidity sensors to measure the air humidity inside and outside the granary cannot directly reflect the internal conditions of the grain pile.
[0003] In the prior art, electronic temperature and humidity sensors are often installed at specific locations inside a granary to facilitate management of the granary, that is, to ventilate and maintain the granary in a timely manner according to changes in temperature and humidity of the grain inside the granary.
[0004] However, the electronic sensors in the prior art are installed at specific locations in the granary and can only monitor the temperature and humidity at specific locations in the granary. The monitoring range of the electronic sensors is limited, and blind spots are prone to occur, making it impossible to achieve comprehensive and effective monitoring of the granary. There is room for improvement. Utility Model Content
[0005] In order to conduct comprehensive and effective temperature and humidity monitoring of the granary and facilitate operators to accurately manage the granary, the present application provides a granary temperature and humidity monitoring device.
[0006] The granary temperature and humidity monitoring device provided in this application adopts the following technical solution:
[0007] A granary temperature and humidity monitoring device comprises a plurality of monitoring pipes fixedly installed inside the granary, wherein the distance between any two adjacent monitoring pipes is the same;
[0008] A temperature and humidity monitoring mechanism is fixedly installed in each of the monitoring pipes, and each of the temperature and humidity monitoring mechanisms includes a plurality of temperature and humidity fiber grating sensors, and the plurality of temperature and humidity fiber grating sensors are arranged along the axial direction of the monitoring pipes, and the plurality of temperature and humidity monitoring mechanisms are electrically connected to a control host in a control room;
[0009] The monitoring pipeline is respectively provided with a plurality of monitoring windows for exposing a plurality of the temperature and humidity fiber grating sensors.
[0010] By adopting the above technical solution, through the temperature and humidity monitoring mechanism installed in the monitoring pipe inside the granary, the multiple temperature and humidity fiber grating sensors on the temperature and humidity monitoring mechanism can form a monitoring network at different locations in the granary, and effectively and comprehensively monitor the real-time temperature and humidity at different locations in the granary, which can facilitate the operator to manage the granary.
[0011] Preferably, the temperature and humidity monitoring mechanism comprises a plurality of light sources, a plurality of optical fibers, and a wavelength demodulator, and a plurality of the temperature and humidity fiber grating sensors are respectively installed in series on the plurality of the optical fibers;
[0012] A first bridge is fixedly installed above the inner wall of the granary, the light sources are fixedly installed in the first bridge, and a plurality of the light sources are respectively connected to the input ends of the optical fibers;
[0013] A second bridge is fixedly installed at the bottom of the granary, and the two ends of the monitoring pipeline are fixedly connected to the first bridge and the second bridge respectively. The optical fiber and the temperature and humidity fiber grating sensor are respectively located in a number of the monitoring pipelines, and the output ends of the several optical fibers are connected to the wavelength demodulator;
[0014] The signal output end of the wavelength demodulator is connected to the control host signal in the control room.
[0015] By adopting the above technical solution, in the actual monitoring process, the light source system emits light of a certain bandwidth into the fiber Bragg grating temperature and humidity sensor. Due to the selection effect of the grating inside the fiber Bragg grating temperature and humidity sensor on the central wavelength signal, the light that meets the wavelength relationship is reflected, and then the reflection wavelength change of the fiber Bragg grating is demodulated by the wavelength demodulator, and processed by the signal processor inside the control host. In the temperature and humidity fiber Bragg grating sensor, a fiber Bragg grating (FBG) coating layer is formed by a humidity-sensitive material-fluorinated polyimide (PI) film. When the ambient humidity changes, the coating expands, causing the fiber Bragg grating to be elongated and strained, causing the Bragg central wavelength to change. The control host derives the measured temperature value by demodulating the drift of the central wavelength, and then indirectly obtains the humidity change, so as to realize the monitoring of the temperature and humidity at the location of the temperature and humidity fiber Bragg grating sensor.
[0016] Preferably, a mounting rod is fixedly installed in the monitoring pipeline, and the optical fiber and the temperature and humidity fiber grating sensor are both fixedly installed on the mounting rod.
[0017] By adopting the above technical solution, the optical fiber and the temperature and humidity fiber Bragg grating sensor can be fixedly installed in the monitoring pipeline through the installation rod, and the monitoring pipeline can provide good protection for the optical fiber and the temperature and humidity fiber Bragg grating sensor.
[0018] Preferably, a breathable baffle is fixedly mounted on each of the monitoring windows, and a plurality of breathable holes are formed on the breathable baffle.
[0019] By adopting the above technical solution, the breathable partition can ensure that the air inside the granary passes into the monitoring pipe, which can facilitate the temperature and humidity fiber grating sensor located in the monitoring pipe to monitor the ambient humidity at the location.
[0020] Preferably, a graphite thermal conductive film is fixedly mounted on the outer wall of the monitoring pipe, a hole for the graphite thermal conductive film to be inserted into is opened on one side of the breathable partition, the portion of the graphite thermal conductive film extending into the hole is fixedly mounted on the mounting rod, and the portion of the graphite thermal conductive film extending into the hole is in contact with the temperature and humidity fiber grating sensor.
[0021] By adopting the above technical solution, since the graphite thermal conductive film has good thermal conductivity, heat transfer is carried out through the graphite thermal conductive film, which can ensure the accuracy of the temperature value measured by the temperature and humidity fiber Bragg grating sensor.
[0022] In summary, the granary temperature and humidity monitoring device of the present application includes at least one of the following beneficial technical effects:
[0023] 1. Through the temperature and humidity monitoring mechanism installed in the monitoring pipe inside the granary, multiple temperature and humidity fiber grating sensors on the temperature and humidity monitoring mechanism can form a monitoring network at different locations in the granary, and effectively and comprehensively monitor the real-time temperature and humidity at different locations in the granary, which can facilitate the operator to manage the granary;
[0024] 2. Since the graphite thermal conductive film has good thermal conductivity, heat transfer through the graphite thermal conductive film can ensure the accuracy of the temperature value measured by the temperature and humidity fiber Bragg grating sensor. BRIEF DESCRIPTION OF THE DRAWINGS
[0025] Figure 1 It is a schematic diagram of an embodiment of the present application for illustrating the overall structure of a monitoring device.
[0026] Figure 2 It is a schematic diagram used in an embodiment of the present application to display the internal structure of a monitoring pipeline.
[0027] Figure 3 It is a schematic diagram of an embodiment of the present application for displaying the overall structure of a monitoring window.
[0028] Explanation of the accompanying drawings: 1. Granary; 11. First bridge; 12. Second bridge; 2. Monitoring pipeline; 21. Monitoring window; 22. Mounting rod; 23. Breathable partition; 231. Socket; 24. Graphite thermal conductive film; 3. Temperature and humidity monitoring mechanism; 31. Light source; 32. Optical fiber; 4. Temperature and humidity fiber grating sensor. DETAILED DESCRIPTION
[0029] The following is combined with Figure 1-3 This application is described in further detail.
[0030] Example
[0031] The present application embodiment discloses a granary temperature and humidity monitoring device. Figure 1 , Figure 2 as well as Figure 3 It mainly includes a plurality of monitoring pipes 2 fixedly installed inside a granary 1, and the spacing between any two adjacent monitoring pipes 2 is the same; temperature and humidity monitoring mechanisms 3 are fixedly installed in the plurality of monitoring pipes 2, and the temperature and humidity monitoring mechanisms 3 include a plurality of temperature and humidity fiber grating sensors 4, and the plurality of temperature and humidity fiber grating sensors 4 are arranged along the axial direction of the monitoring pipes 2, and the plurality of temperature and humidity monitoring mechanisms 3 are electrically connected to a control host in a control room; a plurality of monitoring windows 21 for exposing the plurality of temperature and humidity fiber grating sensors 4 are respectively opened on the monitoring pipes 2.
[0032] By installing a temperature and humidity monitoring mechanism 3 in a monitoring pipe 2 inside the granary 1, a plurality of temperature and humidity fiber grating sensors 4 on the temperature and humidity monitoring mechanism 3 can form a monitoring network at different positions in the granary 1, thereby effectively and comprehensively monitoring the real-time temperature and humidity at different positions in the granary 1, and making it convenient for operators to manage the granary 1.
[0033] It should be noted that in the embodiment of the present application, the monitoring pipe 2 is arranged perpendicular to the ground, and there are 7 monitoring pipes 2. The 7 monitoring pipes 2 are located in the middle of the granary 1 and are evenly arranged in a straight line inside the granary 1. In each monitoring pipe 2, 3 temperature and humidity fiber grating sensors 4 are installed axially, forming a 3×7 distributed monitoring area in the middle of the granary 1, which can realize temperature monitoring of multiple points inside the granary 1.
[0034] In some other embodiments, according to actual needs, the number of monitoring pipes 2 and the number of temperature and humidity fiber grating sensors 4 installed in each monitoring pipe 2 can be increased or decreased, and the arrangement structure and installation position of the monitoring pipes 2 can also be changed, which is not limited here.
[0035] In the embodiment of the present application, the temperature and humidity monitoring mechanism 3 includes a plurality of light sources 31, a plurality of optical fibers 32, and a wavelength demodulator. Figure 1 and Figure 2, three temperature and humidity fiber Bragg grating sensors 4 are respectively installed in series on seven optical fibers 32; a first bridge 11 is fixedly installed above the inner wall of the granary 1, and the light sources 31 are all fixedly installed in the first bridge 11, and several light sources 31 are respectively connected to the input ends of the optical fibers 32.
[0036] A second bridge 12 is fixedly installed at the bottom of the granary 1, and the two ends of the seven monitoring pipes 2 are fixedly connected to the first bridge 11 and the second bridge 12 respectively. The optical fiber 32 and the temperature and humidity fiber grating sensor 4 are respectively located in several monitoring pipes 2, and the output ends of the seven optical fibers 32 are all connected to the wavelength demodulator; the signal output end of the wavelength demodulator is connected to the control host signal in the control room.
[0037] Among them, both ends of the first bridge 11 are fixed to the inner wall of the granary 1 by welding, the first bridge 11 is erected above the inside of the granary 1, and the bottom of the first bridge 11 is respectively provided with first mounting holes for the optical fiber to extend out, and the top of the monitoring pipe 2 is fixed to the bottom of the first bridge 11 by welding; the second bridge 12 is fixed to the bottom of the granary 1 by welding, the bottom of the monitoring pipe 2 passes through the bottom of the granary 1 and is fixedly connected to the top of the second bridge 12, and the top of the second bridge 12 is provided with a second mounting hole for the optical fiber to extend out.
[0038] It should be noted that, in the embodiment of the present application, the seven optical fibers 32 are connected to the wavelength demodulator through an optical cable led out of an optical fiber fusion splicing package fixedly installed in the second bridge 12 .
[0039] During the actual monitoring process, the light source 31 system emits light of a certain bandwidth into the fiber Bragg grating temperature and humidity sensor. Due to the selection of the central wavelength signal by the grating inside the fiber Bragg grating temperature and humidity sensor, the light that meets the wavelength relationship is reflected, and then the reflected wavelength change of the fiber Bragg grating is demodulated by the wavelength demodulator, and processed by the signal processor inside the control host.
[0040] Among them, since the temperature and humidity fiber Bragg grating sensor 4 uses a moisture-sensitive material - fluorinated polyimide (PI) film as a fiber Bragg grating (FBG) coating layer to form a fiber Bragg grating humidity sensor, when the ambient humidity changes, it causes the coating to expand, causing the fiber Bragg grating to be elongated and strained, causing the Bragg center wavelength to change. The control host derives the measured temperature value by demodulating the drift of the center wavelength, and then indirectly calculates the humidity change, thereby realizing the monitoring of the temperature and humidity at the location of the temperature and humidity fiber Bragg grating sensor 4.
[0041] Reference Figure 2 A mounting rod 22 is fixedly installed in the monitoring pipeline 2, and the optical fiber 32 and the temperature and humidity fiber grating sensor 4 are fixedly installed on the mounting rod 22 by cable ties.
[0042] The optical fiber and the temperature and humidity fiber Bragg grating sensor 4 can be fixedly installed in the monitoring pipeline 2 through the mounting rod 22 , and the monitoring pipeline 2 can provide good protection for the optical fiber and the temperature and humidity fiber Bragg grating sensor 4 .
[0043] Reference Figure 2 and Figure 3 , the monitoring windows 21 are respectively fixedly mounted with air-permeable baffles 23, and the air-permeable baffles 23 are provided with a plurality of air holes. The air-permeable baffles 23 can ensure that the air inside the granary 1 passes into the monitoring pipe 2, and at the same time can reduce the occurrence of agricultural product particles entering the monitoring pipe 2, so that the temperature and humidity fiber Bragg grating sensor 4 located in the monitoring pipe 2 can monitor the ambient humidity at the location.
[0044] Reference Figure 3 A graphite heat-conducting film 24 is fixedly installed on the outer wall of the monitoring pipe 2, and a plug hole 231 for the graphite heat-conducting film 24 to extend into is opened on one side of the breathable partition 23. The part of the graphite heat-conducting film 24 extending into the plug hole 231 is fixedly installed on the mounting rod 22, and the part of the graphite heat-conducting film 24 extending into the plug hole 231 is in contact with the temperature and humidity fiber grating sensor 4.
[0045] Since the graphite thermal conductive film 24 has good thermal conductivity, heat transfer through the graphite thermal conductive film 24 can ensure the accuracy of the temperature value measured by the temperature and humidity fiber Bragg grating sensor 4.
[0046] The implementation principle of a granary temperature and humidity monitoring device in an embodiment of the present application is as follows: through a temperature and humidity monitoring mechanism 3 installed in a monitoring pipe 2 inside a granary 1, multiple temperature and humidity fiber grating sensors 4 on the temperature and humidity monitoring mechanism 3 can form a monitoring network at different positions in the granary 1, and effectively and comprehensively monitor the real-time temperature and humidity at different positions in the granary 1, which can facilitate the operator to manage the granary 1.
[0047] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.
Claims
1. A granary temperature and humidity monitoring device, characterized in that: It comprises a plurality of monitoring pipes (2) fixedly installed inside a granary (1), wherein the distance between any two adjacent monitoring pipes (2) is the same; A temperature and humidity monitoring mechanism (3) is fixedly installed in each of the monitoring pipes (2), and each of the temperature and humidity monitoring mechanisms (3) comprises a plurality of temperature and humidity fiber grating sensors (4). The plurality of temperature and humidity fiber grating sensors (4) are arranged along the axial direction of the monitoring pipes (2), and the plurality of temperature and humidity monitoring mechanisms (3) are electrically connected to a control host in a control room; The monitoring pipe (2) is provided with a plurality of monitoring windows (21) for exposing a plurality of temperature and humidity fiber grating sensors (4).
2. A granary temperature and humidity monitoring device according to claim 1, characterized in that: The temperature and humidity monitoring mechanism (3) comprises a plurality of light sources (31), a plurality of optical fibers (32), and a wavelength demodulator, and a plurality of the temperature and humidity fiber grating sensors (4) are respectively installed in series on the plurality of the optical fibers (32); A first bridge (11) is fixedly installed above the inner wall of the granary (1), the light sources (31) are all fixedly installed in the first bridge (11), and a plurality of the light sources (31) are respectively connected to the input ends of the optical fibers (32); A second bridge (12) is fixedly installed at the bottom of the granary (1), and the two ends of the monitoring pipeline (2) are respectively fixedly connected to the first bridge (11) and the second bridge (12), the optical fiber (32) and the temperature and humidity fiber grating sensor (4) are respectively located in a plurality of the monitoring pipelines (2), and the output ends of the plurality of optical fibers (32) are all connected to the wavelength demodulator; The signal output end of the wavelength demodulator is connected to the control host signal in the control room.
3. A granary temperature and humidity monitoring device according to claim 2, characterized in that: A mounting rod (22) is fixedly mounted in the monitoring pipe (2), and the optical fiber (32) and the temperature and humidity fiber grating sensor (4) are both fixedly mounted on the mounting rod (22).
4. A granary temperature and humidity monitoring device according to claim 3, characterized in that: A ventilating baffle plate (23) is fixedly mounted on each of the monitoring windows (21), and a plurality of ventilating holes are formed on the ventilating baffle plate (23).
5. A granary temperature and humidity monitoring device according to claim 4, characterized in that: A graphite heat-conducting film (24) is fixedly mounted on the outer wall of the monitoring pipe (2); a plug hole (231) for the graphite heat-conducting film (24) to extend into is provided on one side of the air-permeable partition plate (23); the portion of the graphite heat-conducting film (24) extending into the plug hole (231) is fixedly mounted on the mounting rod (22); and the portion of the graphite heat-conducting film (24) extending into the plug hole (231) is in contact with the temperature and humidity fiber grating sensor (4).