CN114324053A - Automatic measuring device and method for water content of plant leaves - Google Patents

Abstract

The invention discloses an automatic measuring device and method for the water content of plant leaves. The plant leaves are shredded, so that the drying efficiency is improved, and the accuracy of a measurement result is ensured; and the real-time calculation of the change rate of the water content is matched, so that the drying end time is automatically judged, and the automatic measurement of the water content of the plant leaves is realized.

Description

A kind of automatic measuring device and method of plant leaf moisture content

technical field

The invention relates to standardizing treatment and moisture content measurement of plant leaves, in particular to an automatic measuring device and method for moisture content of plant leaves.

Background technique

In industries such as cigarettes and traditional Chinese medicine production, since the moisture content of the raw materials has an important impact on the final product, after each factory purchases the raw materials from the growers, it is necessary to loose and re-moisture the raw materials. Carry out moisture content measurement; in actual production, when it comes to the moisture content measurement of plant leaves, due to the uneven size of plant leaves, inaccurate measurement results often occur in the process of moisture content measurement; in the laboratory In the process of water content measurement experiment, it is usually necessary to perform pretreatment operations such as grinding on the sample to be tested; in the process of grinding, due to the influence of the experimental environment and the evaporation of water of the measured object itself, it will inevitably affect the final moisture content. measurement results, resulting in the final measurement results are usually lower than the actual moisture content. In view of the above situation, the present invention aims to provide a method for pretreatment, drying and moisture content measurement of the tested object in order to solve the problems of cumbersome processing steps for the tested sample and inaccurate final measurement results in the process of measuring the water content of plant leaves. It can automatically determine the drying end time and correct the moisture content measurement results according to the change rate of the moisture content of the measured object, so as to realize the automatic measurement of the moisture content of plant leaves and improve the accuracy of the measurement results. The technical scheme adopted by the present invention to solve its technical problems is:

The automatic measuring device for plant leaf moisture content is characterized by: a sample processing module, a lifting module, a sample carrying module, a drying and temperature measuring module, a weighing module, and a control and display module.

The sample processing module includes a spring structure, a motor, a special-shaped coupling and a hob structure; the spring structure is composed of a spring piece, an upper end fixing piece and a lower end fixing piece, and the upper part of the spring piece is connected with the upper end fixing piece, and the spring The lower part of the motor is connected with the lower end fixing part; the motor rear end cover is connected with the above-mentioned lower end fixing part, and the central shaft of the motor is fixed with the special-shaped coupling; the side of the special-shaped coupling has three threaded holes for fixing Hob structure; the hob structure is driven by the motor to perform shredding processing on the sample;

The lifting module is mainly composed of a casing, an electric telescopic rod, and an insulating rubber ring; the casing is divided into upper and lower parts, and the upper casing is driven by the electric telescopic rod to open and close with the lower casing; the interior of the upper casing is a cylindrical hollow The structure is used to install the upper end fixing part in the sample processing module; the heat insulating rubber ring is fixed on the bottom end face of the upper casing, which is used for heat insulation and weakening the collision with the lower casing;

The sample carrying module is mainly composed of a tray, a tray frame and a lifting rod structure; the edge of the tray has a certain width and can be mounted on the tray frame; the tail end of the tray frame is fixed to the lifting rod structure; the The lifting rod structure consists of a motor, a lifting link and a base, and the motor and the lifting link are respectively fixed on the base;

The drying and temperature measurement module is mainly composed of a heat shield, a heating wire, a heating plate and a temperature sensor; the bottom of the heat shield is connected with the heating wire, and the upper and lower ends of the heating plate are circular structures. The side wall of the heating plate has a ventilation function and a temperature sensor is installed (the outer wall structure can be designed as a multi-faceted structure, and the ventilation structure and the installation of the temperature sensor can be designed as needed); the heating plate is embedded in the heat shield and fixed on the heating wire Above, there is a through hole in the center of the heating plate and the heat shield, which is used for the installation of the connecting column in the weighing module;

The weighing module is composed of a cross bracket, a connecting column and a weighing platform; the cross bracket and the weighing platform are connected by a connecting column.

The control and display module realizes the control of the motor and the heating module, reads the temperature data of the temperature sensor and the weight data of the weighing module, performs data processing and display, and has the communication function of the upper computer;

Preferably, the hob structure is composed of a main rod, a rubber sleeve and a blade set, the end of the main rod is threaded, which can be matched and connected with the threaded holes on the side of the special-shaped coupling, and the rubber sleeve is sleeved on the main rod; the blade set It consists of a bearing and an annular blade. The annular blade is embedded in the outer ring of the bearing, and the bearing is sleeved on the rubber sleeve. The number of blade sets can be determined according to actual needs; the number of hob structures can be set to 2-4 sets, each hob structure The blade set interval can be adjusted, so that the rolling trajectories of all annular blades are evenly staggered; all annular blades have pressure when they are in contact with the tray under the action of the spring structure, which can effectively process the tested sample without damaging the surface of the tray. ;

Preferably, the central part of the bottom of the tray in the sample carrying module is a cylindrical protruding structure, so as to avoid the situation that the central part of the tray cannot be processed by the hob structure during the shredding process;

Preferably, the drying and temperature measurement module is mainly composed of a heat shield, a heating wire, a heating plate and a temperature sensor; the heating wire has a concentric structure and is installed at the bottom of the heating plate to ensure that the upper part of the heating plate is not exposed to the heating plate during the heating process. The sample in the tray is heated evenly;

Preferably, the weighing module is composed of a cross bracket, a connecting column and a weighing platform; the connecting column is installed in the heat shield and the circular hole at the center of the heating plate in the above drying and temperature measuring module, and the upper end of the connecting column is installed in the circular hole at the center of the heating plate. It is connected with the cross bracket, and the lower end is connected with the weighing platform; in the weighing state, the cross bracket drives the connecting column to squeeze the weighing platform below, so as to measure the weight of the object to be measured.

The workflow of the automatic detection device for plant leaf moisture content includes the following specific contents:

The first step is to click the button on the control and display module to raise the upper shell in the lifting module and the tray holder in the sample carrying structure; the second step is to place the sample to be tested evenly on the periphery of the tray, and grasp it with tweezers. On the pallet rack; the third step, click the button on the control and display module again, so that the pallet rack is continuously lowered in height through the lifting rod structure, until the tray is placed on the cross bracket and separated from it; the upper shell is continuously lowered through the lifting rod until it is The lower shell is closed, and the thermal insulation strip prevents the upper and lower shells from colliding, and also makes a closed space inside; the fourth step, the motor in the sample processing module starts to rotate at a slow speed, driving the hob structure to cut the standard sample Filament treatment, the treatment time is determined according to the actual needs of the sample quality; the fifth step, after the end of the shredding treatment, the heating wire in the drying and temperature measurement module is rapidly heated to 100 °C, and the temperature sensor and the weighing platform in the balance module are started. Collect and record relevant data in real time; the collected weight data is combined with the drying time, and the device can automatically calculate the moisture content and the moisture content change rate; the sixth step, when the moisture content change rate drops to δ, automatically stop drying and output the corresponding moisture content, complete the moisture content measurement and output the corresponding moisture content measurement results;

Compared with the prior art device, the present invention has the following beneficial effects:

1. The device of the present invention automates the water content measurement process of plant leaves. During the measurement process, the user only needs to place the sample in the tray, and the device will automatically complete the remaining measurement steps to improve the measurement efficiency.

2. The device of the present invention solves the problem of inaccurate moisture content measurement results due to the size of plant leaves. By shredding the plant leaves before drying, the drying time is shortened while ensuring that the moisture content measurement results are not affected. , to improve the measurement accuracy.

3. The device of the present invention solves the problem that the drying time cannot be determined when measuring different kinds of samples by recording the corresponding weight change rate when measuring the moisture content of standard plant leaf samples, determines the standard for the end of drying, and improves the accuracy of the measurement results. stability.

FIG. 1 is an overall view of the automatic measuring device for the moisture content of plant leaves in the device of the present invention.

Figure 2 is a structural diagram of an automatic measuring device for plant leaf moisture content.

Figure 3 is a structural diagram of a sample processing module.

FIG. 4 is a structural diagram of a lifting module.

Figure 5 is a structural diagram of a sample carrying module.

FIG. 6 is a structural diagram of a drying and temperature measurement module.

Figure 7 is a structural diagram of a weighing module.

Figure 8 is a structural diagram of a hob.

Fig. 9 is the working flow chart of the automatic measuring device for plant leaf moisture content.

In the figure: 1. Sample processing module; 2. Lifting module; 3. Sample carrying module; 4. Drying and temperature measurement module; 5. Weighing module; 6. Control and display module; 1-1, Upper fixing part; 1-2, spring parts; 1-3, lower end fixing parts; 1-4 motor; 1-5, hob structure; 1-6, special-shaped coupling; 2-1, upper shell; 2-2, electric telescopic Rod; 2-3, Heat Insulation Rubber Ring; 2-4, Lower Shell; 3-1, Tray Rack; 3-2, Lifting Link; 3-3, Motor; 3-4, Base; 3-5, Tray ;4-1, heating plate; 4-2, temperature sensor; 4-3, heat shield; 4-4, heating wire; 5-1, cross bracket; 5-2, connecting column; 5-3, weighing Table; 1-5-1, main rod; 1-5-2, rubber sleeve; 1-5-3, blade set;

Detailed ways

The device of the present invention will be further described below with reference to the accompanying drawings.

The 1 sample processing module is shown in Figure 3, including a spring structure, a 1-4 motor, a 1-6 special-shaped coupling and a 1-5 hob structure; the spring structure consists of 1-2 spring parts, 1 -1 Upper fixing part and 1-3 lower fixing part; 1-2 The upper part of the spring part is connected to the 1-1 upper fixing part; 1-2 The lower part of the spring part is connected to the 1-3 lower part fixing part; The cover is connected with the fixing part at the lower end of 1-3, the central shaft of the motor 1-4 is fixed with the special-shaped coupling 1-6; the side of the special-shaped coupling 1-6 has three threaded holes for fixing the hob structure of 1-5; The 1-5 hob structure is driven by the motor to perform shredding processing on the sample;

The 2-lift module is shown in Figure 4, which is mainly composed of a casing, 2-2 electric telescopic rods, and 2-3 thermal insulation rubber rings; the casing is composed of 2-1 upper casing and 2-4 lower casing; 2-1 The inner shell of the upper shell is a cylindrical hollow structure, which is used to be fixed with the upper fixing part of 1-1 in the sample processing module 1; 4. The lower shell is fixed; 2-3 The heat insulation rubber ring is fixed on the bottom end face of the 2-1 upper shell, which is used for heat insulation and weakening the collision with the lower shell;

The 3-sample carrying module is shown in Figure 5, which is mainly composed of a 3-1 tray rack, a 3-5 tray and a lifting rod structure; 1 In the pallet rack, the tail of the 3-1 pallet rack is fixed with the lift rod structure; the lift rod structure is composed of 3-2 lift links, 3-3 motors and 3-4 bases, 3-3 motors and 3 -2 Lifting links are respectively fixed on 3-4 bases.

The 4 drying and temperature measurement modules are shown in Figure 6, and are mainly composed of 4-3 heat shields, 4-4 heating wires, 4-1 heating plates and 4-2 temperature sensors; the 4-3 The bottom of the heat shield is connected with the 4-4 heating wire; the upper and lower ends of the 4-1 heating plate are circular structures, the side walls have ventilation function and 4-2 temperature sensors are installed (the outer wall structure can be designed as a multi-faceted structure, ventilation The structure and installation of the temperature sensor can be designed as needed); the 4-1 heating plate is embedded in the 4-3 heat shield, fixed above the 4-4 heating wire, and the 4-1 heating plate is insulated from 4-3. There is a through hole in the center of the cover, which is used for the installation of the 5-2 connecting column in the 5 weighing module;

The said 5 weighing module is shown in Figure 7, which consists of 5-1 cross bracket, 5-2 connecting column and 5-3 weighing platform; 5-1 cross bracket and 5-3 weighing platform pass through 5-2 The connecting column is connected.

The above-mentioned 6 control and display modules realize the control of the motor and the heating module, read the temperature data of the temperature sensor and the weight data of the weighing module, and carry out data processing and display, and have the communication function of the host computer;

Preferably, the 1-5 hob structure is shown in Figure 8, which consists of 1-5-1 main rod, 1-5-2 rubber sleeve, 1-5-3 blade set, 1-5-1 main rod The end of the blade is threaded, which can be matched with the threaded holes on the side of the 1-6 special-shaped coupling, and the 1-5-2 rubber sleeve is sleeved on the 1-5-1 main rod; the 1-5-3 blade group It is composed of annular blades, which are embedded in the outer ring of the bearing, and the bearing is sleeved on the 1-5-2 rubber sleeve. The number of 1-5-3 blade sets can be determined according to actual needs; the number of 1-5 hob structures can be set as 2-4 groups, the interval of 1-5-3 blade groups in each 1-5 hob structure can be adjusted, so that the rolling tracks of all annular blades are evenly staggered; There is pressure when the tray is in contact, which can effectively process the tested sample without damaging the surface of 3-5 trays;

Preferably, the central part of the bottom of the tray in the 3-sample carrying module is a cylindrical protruding structure, so as to avoid the 1-5 hob structure from being unable to be processed by the central part of the 3-5 tray during the shredding process. Happening;

Preferably, the 4 drying and temperature measurement modules are mainly composed of 4-3 heat shields, 4-4 heating wires, 4-1 heating plates and 4-2 temperature sensors; 4-4 heating wires are concentric circle structures And installed at the bottom of the 4-1 heating plate to ensure uniform heating of the samples in the 3-5 trays above the 4-1 heating plate during the heating process;

Preferably, the 5 weighing modules are composed of 5-1 cross brackets, 5-2 connecting columns and 5-3 weighing platforms; 5-2 connecting columns are installed in 4-3 of the 4 drying and temperature measuring modules In the heat shield and the circular hole at the center of the heating plate in 4-1, the upper end of the 5-2 connecting column is connected to the 5-1 cross bracket, and the lower end is connected to the 5-3 weighing platform; in the weighing state, the 5-1 cross bracket Drive the 5-2 connecting column to squeeze the 5-3 weighing platform to measure the weight of the object to be measured.

In the present embodiment, the workflow of the automatic detection device for plant leaf moisture content includes the following specific contents:

The first step is to click the lift button on the 6 control and display module to raise the upper shell in the 6 lift module and the 3-1 tray rack in the 3 sample carrier module; 5. The periphery of the tray is clamped to the 3-1 tray frame with tweezers; the third step is to click the start button on the 6 control and display module again, so that the 3-1 tray frame is continuously lowered through the lifting rod structure until the 3-1 tray is lowered. -5 The tray is placed on the 5-1 cross bracket and separated from it; the 2-1 upper shell is continuously lowered by the 2-2 electric telescopic rod until it is closed with the 2-4 lower shell, and the 2-3 thermal insulation strip prevents the upper and lower shells When the bump occurs, a closed space is also formed inside; the fourth step, the motor in the 1 sample processing module starts to rotate slowly, driving the 1-5 hob structure to shred the standard sample, and the processing time is based on the actual sample needs. The quality is determined; the fifth step, after the shredding process is completed, the heating wire 4-4 in the drying and temperature measurement module 4 is rapidly heated to 100 ° C, and the temperature sensor 4-2 and the weighing module 5-3 in the weighing module are weighed. The heavy table starts to collect and record relevant data in real time; the collected weight data is combined with the drying time, and the device can automatically calculate the moisture content and the moisture content change rate; the sixth step, when the moisture content change rate drops to δ, it will automatically stop drying And output the corresponding water content, complete the water content measurement and output the corresponding water content measurement results;

So far, through the structure of the automatic measuring device for plant leaf moisture content and the introduction of the measurement method of moisture content and moisture content change rate, the rapid measurement of plant leaf moisture content has been realized, which makes up for the current process of measuring plant leaves. The defects of inaccurate measurement results caused by the large difference in the shape and size of the blade itself and the cumbersome processing steps, highlight the transformation of the experimental device to automation and intelligence.

The above is only a preferred embodiment of the present invention, and does not limit the present invention. Any simple modifications, changes and equivalent structural changes made to the above embodiments according to the technical essence of the present invention still belong to the technology of the present invention. within the scope of the program.

Claims (4)

1. The utility model provides an automatic measuring device of plant leaf moisture content which characterized in that: the device consists of a sample processing module, a lifting module, a sample bearing module, a drying and temperature measuring module, a weighing module and a control and display module;

the sample processing module comprises a spring structure, a motor, a special-shaped coupler and a hob structure; the spring structure consists of a spring part, an upper end fixing part and a lower end fixing part, wherein the upper part of the spring part is connected with the upper end fixing part, and the lower part of the spring part is connected with the lower end fixing part; the rear end cover of the motor is connected with the lower end fixing piece, and the central shaft of the motor is fixed with the special-shaped coupler; the side surface of the special-shaped coupler is provided with three threaded holes for fixing a hob structure; the hob structure is driven by a motor to shred the sample;

the lifting module mainly comprises a shell, an electric telescopic rod and a heat insulation rubber ring; the shell is divided into an upper part and a lower part, and the upper part shell is driven by the electric telescopic rod to be opened and closed with the lower part shell; the upper part shell is internally provided with a cylindrical hollow structure and is used for installing an upper end fixing piece in the sample processing module; the heat insulation rubber ring is fixed on the bottom end surface of the upper shell and used for insulating heat and weakening collision with the lower shell;

the sample bearing module mainly comprises a tray, a tray frame and a lifting rod structure; the edge of the tray has a certain width and can be erected on the tray frame; the tail end of the tray frame is fixed with the lifting rod structure; the lifting rod structure consists of a motor, a lifting rod and a base, and the motor and the lifting rod are respectively fixed on the base;

the drying and temperature measuring module mainly comprises a heat shield, a heating wire, a heating plate and a temperature sensor; the bottom of the heat shield is connected with a heating wire, the upper end and the lower end of the heating plate are of circular structures, the side wall of the heating plate has a ventilation function and is provided with a temperature sensor (the outer wall structure can be designed into a multi-surface structure, and the ventilation structure and the temperature sensor can be designed as required); the heating plate is embedded in the heat insulation cover and fixed above the heating wire, and a through hole is formed in the centers of the heating plate and the heat insulation cover and used for installing a connecting column in the weighing module;

the weighing module consists of a cross bracket, a connecting column and a weighing platform; the cross-shaped bracket is connected with the weighing platform through a connecting column;

the control and display module is used for controlling the motor and the heating module, reading temperature data of the temperature sensor and weight data of the weighing module, processing and displaying data, and has an upper computer communication function;

2. the automatic measuring device of plant leaf moisture content of claim 1, characterized in that: the hob structure consists of a main rod, a rubber sleeve and a blade set, wherein the tail end of the main rod is provided with a thread and can be matched and connected with a threaded hole in the side surface of the special-shaped coupler, and the rubber sleeve is sleeved on the main rod; the blade group consists of a bearing and annular blades, the annular blades are embedded in the outer ring of the bearing, the bearing is sleeved on the rubber sleeve, and the installation number of the blade group can be determined according to actual requirements; the number of the hob structures can be set to 2-4 groups, and the interval of the blade groups in each hob structure can be adjusted, so that the rolling tracks of all the annular blades are staggered uniformly; all the annular blades have pressure when contacting the tray under the action of the spring structure, so that the tested sample is effectively processed while the surface of the tray is not damaged;

3. the automatic measuring device of plant leaf moisture content of claim 1, characterized in that: the central part of the bottom of the tray in the sample bearing module is of a cylindrical protruding structure, so that the situation that the central part of the tray cannot be processed in the shredding process of the hob structure is avoided; meanwhile, a heating wire with a concentric circle structure is matched, so that the sample in the tray is uniformly heated in the heating process;

4. a measuring method of an automatic measuring device for the water content of plant leaves is characterized in that: the operation process is simple, and sample processing, stoving are weighed, result display and output all automated processing, and the main flow is: firstly, clicking a key to lift an upper shell in a lifting structure and a tray frame in a sample bearing structure, and uniformly placing a sample to be detected into a tray and placing the sample into the tray frame; clicking a starting button, and descending the tray frame until the tray is placed on the cross-shaped bracket; the upper shell is also descended until the upper shell is closed with the lower shell; then, a hobbing cutter structure in the sample processing module shreds the samples in the tray; after the shredding treatment is finished, rapidly heating the heating wire to 100 ℃, simultaneously collecting the measurement data of the temperature sensor and the weighing platform in real time, and calculating the water content and the change rate of the water content; and when the change rate of the moisture content is reduced to sigma, automatically stopping drying, outputting the corresponding moisture content, and finishing the moisture content measurement.

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