CN215678393U

CN215678393U - Soil water-retaining detection and calculation teaching device

Info

Publication number: CN215678393U
Application number: CN202122634034.4U
Authority: CN
Inventors: 刘辉; 马帅; 桑胜超
Original assignee: Jinan Minrry Technology Co ltd
Current assignee: Jinan Minrry Technology Co ltd
Priority date: 2021-11-01
Filing date: 2021-11-01
Publication date: 2022-01-28
Anticipated expiration: 2031-11-01

Abstract

The utility model relates to the technical field of teaching equipment, in particular to a soil water retention detection and calculation teaching device which adopts a unitized structure and mainly comprises an experiment unit and a control acquisition unit, wherein the units are connected through aviation connectors; the whole experiment unit is a cuboid frame body, the inner wall of the experiment unit is provided with a plurality of U-shaped bosses, the experiment pipeline is fixed on the bosses by using U-shaped pipe clamping buckles, and the pipeline is connected with the pipeline by using quick connectors; the water inlet of the experiment pipeline is connected with the water outlet of the water pump, and the water inlet of the water pump is connected with the water storage tank to provide water source for the experiment; the experiment chamber installs additional in cuboid frame top, contains a plurality of experiment containers, and the control acquisition unit openly distributes several aviation plug interface, is connected with each sensor in the experiment unit, and inside is equipped with data processing module, arranges the analysis to data, holds the computer with data transmission through the USB interface, and the student can observe the water-retaining nature of record soil and study soil moisture characteristic curve according to experimental data.

Description

Soil water-retaining detection and calculation teaching device

Technical Field

The utility model relates to the technical field of teaching equipment, in particular to a soil water retention detection and calculation teaching device.

Background

The soil moisture can affect the absorption of nutrient by crops, the decomposition of organic nutrient, the dissolution of chemical fertilizer applied in soil in water and other processes in the growth process of plants, and the normal growth of plants can be affected when the soil moisture is insufficient or excessive.

The method for measuring the water retention of soil in the current teaching is mainly a drying and weighing method, after soil fully absorbs water, a soil sample is taken by a cutting ring, the soil is weighed and dried again, the reduced mass is the water content by measuring the weight change before and after drying, and the water content of unit soil volume can be used as the data of the water retention of the soil. But the drying and weighing method is not suitable for simultaneous operation of a plurality of students, and the data of the water retention of the soil cannot be visually displayed, so that the teaching quality is influenced.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a soil water retention detection and calculation teaching device for education institutions such as schools, and students can visually display experimental data by researching the difference between water retention of different soils and understanding the soil water content characteristic curve principle of soil water content relation; the soil moisture content testing device is suitable for teaching of education mechanisms such as schools, can be used for simply measuring in agriculture and forestry, and provides a relatively accurate soil moisture content testing result.

The soil water retention detection and calculation teaching device adopts unitization, mainly comprises an experiment unit and a control acquisition unit, and the two units are connected through an aviation plug to ensure stable power supply and data transmission; the whole experiment unit is a cuboid frame, a plurality of U-shaped bosses are arranged on the inner wall of the experiment unit, the experiment pipeline is fixed on the bosses by using U-shaped pipe clamping buckles, the pipeline is connected with the pipeline by using a quick connector, a pipeline water inlet is connected with a water outlet of a water pump, the water inlet of the water pump is connected with a water storage tank to provide water source and power for the experiment, and the water outlet of the pipeline is connected with the water storage tank to form a water loop; the water inlet of the experiment pipeline is provided with a flow sensor for measuring the flow change in the experiment process, the pipeline is internally provided with a jet pump which can extract liquid containing particles, extract water in a water loop into the experiment cavity to moisten the experiment soil and form vacuum negative pressure to generate suction so as to provide a stable test environment for the experiment, and the second pressure sensor is arranged above the cuboid frame and used for measuring the pressure of the vacuum negative pressure generated by the jet pump so as to reflect the suction; the experimental device comprises a cuboid frame, a cylindrical experimental cavity, a first pressure sensor, a plurality of small cylindrical experimental containers and experimental soil, wherein the cylindrical experimental cavity is arranged above the cuboid frame and is divided into an upper part and a lower part, the middle part is separated by a partition plate, the upper part of the experimental cavity is provided with the first pressure sensor for measuring atmospheric pressure of the experimental cavity, the lower part of the experimental cavity comprises the plurality of small cylindrical experimental containers and the experimental soil, a plurality of soils can be selected for simultaneously carrying out experiments during experimental teaching of students, a soil humidity sensor is arranged in each experimental container, experimental data are monitored and recorded in real time and are transmitted to a control acquisition unit through an aviation plug, a plurality of round holes are uniformly distributed on the experimental cavity base and the upper cover, the experimental cavity base and the upper cover are connected by penetrating through the round holes by using a fixing screw, the fixing screw is convenient to disassemble, and the students can conveniently change the experimental soil; the front of the control acquisition unit is uniformly distributed with a plurality of aviation plug interfaces, the aviation plug interfaces are connected with a soil humidity sensor, a flow sensor and a pressure sensor in the experiment unit, a data processing module is arranged in the control acquisition unit, data are arranged, the data are transmitted to a computer through a USB interface, the computer can display the humidity of the soil and the numerical value of the pressure sensor and generate a soil moisture characteristic curve, the water retention of the soil is represented by the change of the soil humidity and the soil moisture characteristic curve, and students can observe and record conveniently; two portable handles are arranged on the front surface of the control acquisition unit, so that students can move conveniently.

Preferably, the efflux pump during operation can produce suction, the suction size that the efflux pump produced is measured to cuboid frame top installation pressure sensor, soil moisture sensor in the experiment soil measures soil moisture, along with the going on of experiment, the computer regards the suction that second pressure sensor measured as the Y axle of coordinate system, soil moisture that soil moisture sensor measured is as the X axle of coordinate system, generate soil moisture characteristic curve gradually, the student can study the relation of suction and soil water content according to soil moisture characteristic curve, the soil moisture state under the corresponding water content can be reflected to the inflection point of curve, study soil moisture motion, the regulation utilizes soil water, carry out the most important and most basic instrument in the aspect of soil improvement etc..

Preferably, the experiment cavity is divided into an upper part and a lower part, the middle part is divided by a partition plate, and the partition plate can prevent water evaporation during experiment and reduce experiment errors; the upper part of the experimental cavity is provided with a first pressure sensor for measuring the atmospheric pressure in the experimental cavity and comparing the first pressure sensor with a second pressure sensor for measuring vacuum negative pressure, so that students can know the characteristic curve of soil moisture when the pressure is different, and the lower part of the experimental cavity is divided into a plurality of smaller cylindrical experimental containers and experimental soil.

Preferably, the control acquisition unit is used for controlling the operation of the water pump, acquiring the change of parameters such as the flow rate, the soil humidity and the pressure of the system and transmitting the acquired parameters to the computer end through the USB interface.

The utility model has the beneficial effects that: the teaching device is unitized, is convenient to operate, and can be used for teaching experiments by a plurality of students; experiment numerical value when experimental teaching can direct-viewing demonstration on the touch-sensitive screen, and data are accurate understandable, can generate soil moisture characteristic curve, and the student of being convenient for understands the guarantor's water characteristic of soil.

Drawings

FIG. 1 shows a soil water-retaining detection and calculation teaching device overall structure schematic diagram.

FIG. 2 shows a schematic diagram of the structure of the experimental unit.

Fig. 3 shows a schematic structural diagram of the control acquisition unit.

Detailed Description

The utility model is described in detail below with reference to the drawings and the detailed description.

As shown in figure 1, the soil water retention detection and calculation teaching device is structurally unitized, is roughly divided into two parts, namely an experiment unit 30 and a control acquisition unit 31, and uses an aviation plug to perform power supply and data interaction between the units.

As shown in fig. 2, the whole soil water retention detection and calculation teaching device experiment unit 30 is a cuboid frame 7, a plurality of U-shaped bosses are arranged on the inner wall of the cuboid frame 7, and an experiment pipeline is fixed on the U-shaped bosses on the inner wall by using U-shaped pipe clamps 13 in a manner shown in a sectional view a-a; the jet pump 9 is additionally arranged in the experiment pipeline, so that liquid containing particles can be extracted, water in the water loop is extracted into the experiment cavity 2 to moisten experiment soil, vacuum negative pressure can be formed to generate suction, and a stable test environment is provided for an experiment; the water storage tank 11 and the water pump 10 are installed at the bottom of the cuboid frame 7, a water inlet 14 of the water pump 10 is connected with the water storage tank 11, a water outlet of the water pump 10 is connected with a water inlet of an experiment pipeline, a water outlet of the experiment pipeline is connected with the water storage tank 11 to form a water loop, the water pump provides water source and power for the experiment to ensure a large amount of water supply during the experiment, and the water storage tank 11 is provided with a drain pipe 12 for discharging water when the experiment is completed; in the operation process of the water pump 10, the jet pump 9 can pump water in the water loop to deliver the water to the experimental soil 6 in the experimental cavity 2 to wet the experimental soil 6 and cause vacuum negative pressure to generate suction, and the second pressure sensor 16 arranged above the cuboid frame 7 can measure the pressure generated by the vacuum negative pressure formed by the jet pump 9, so that the size of the suction is reflected; a flow sensor 8 is arranged at the water inlet of the experiment pipeline and is used for observing the flow of water delivered by the water pump 10 when the experiment is carried out by students; the cylindrical experiment cavity 2 is arranged above the cuboid, the cylindrical design enables the experiment cavity 2 to be quickly and simply disassembled and assembled, the washing is convenient, and the experiment soil is convenient to replace when students perform experiments; experiment chamber 2 divide into two parts from top to bottom, the centre uses the baffle to separate, 2 upper portions in experiment chamber are equipped with first pressure sensor 1, an atmospheric pressure for measuring in the

experiment chamber

2, 2 lower parts in experiment chamber contain less cylindrical experiment container 17 and experiment container 18 and experiment soil 6, the student can select multiple soil simultaneously to experiment, experiment container 17, be equipped with soil moisture sensor 3 in experiment container 18 and the experiment soil 6, real-time supervision and record experimental data, and with the experimental data transfer be convenient for the student to fetch in the control acquisition unit 31 through the aviation plug.

Fig. 3 is a control acquisition unit 31, which is used to control the operation of the water pump 10, acquire the changes of parameters such as the flow rate, soil humidity and pressure of the system, and transmit the acquired parameters to a computer through a USB interface 25, so as to facilitate the recording and storage of students; as shown in the figure, the front surface of the box body 21 is provided with a sensor aviation plug 23, the sensor aviation plug is connected with all sensors in the experiment unit 30 shown in fig. 2 for data arrangement, data are transmitted to a computer end through a USB interface 25, the computer forms a real-time curve graph through specific software, and the front surface of the control acquisition unit 31 further comprises a portable handle 22, so that the movement before and after the experiment is facilitated.

When the test is started, test soil or sandy soil is put into each experimental container of the experimental cavity 2 in the experimental unit 30, the soil humidity sensor 3 is inserted, a water loop is connected, water is added into the water storage tank 11, the soil humidity sensor 3, the flow sensor 8, the first pressure sensor 1 and the second pressure sensor 16 in the experimental unit 30 are connected with the sensor aviation plug 23 in the control acquisition unit 31, the USB interface 25 is connected with the computer end, after the test is correct, the circuit breaker 24 and the power switch 26 are opened, the water pump 10 is started at the computer end, students can observe real-time graphs of the flow sensor 8, the soil humidity sensor 3, the first pressure sensor 1 and the second pressure sensor 16 through software in the computer and record data, the real-time curve of the soil humidity sensor 3 changes along with the progress of the experiment, and when the curve of the soil humidity sensor 3 tends to be stable, the soil moisture at this time can be represented as the current water retention of the soil, after the data of the second pressure sensor 16 and the soil moisture sensor 3 are collated, along with the progress of the experiment, the computer generates a soil moisture characteristic curve by taking the value of the second pressure sensor 16 as the Y axis of the coordinate system and the value of the soil moisture sensor 3 as the X axis of the coordinate system, and students can learn and study the state and the characteristics of the soil water retention by observing the change of the soil moisture characteristic curve.

Claims

1. The utility model provides a guarantor's water detection and calculation teaching device of soil which characterized in that: the whole body is divided into two parts, including an experiment unit (30) and a control acquisition unit (31), the equipment is unitized, and the units are connected through aviation plugs; the whole experiment unit (30) is a cuboid frame (7), and the inner wall of the cuboid frame (7) is fixed on a U-shaped boss of the inner wall by using a U-shaped pipe clamping buckle (13); a jet pump (9) is additionally arranged in the experiment pipeline, a water storage tank (11) and a water pump (10) are arranged at the bottom of the cuboid frame (7), a water inlet (14) of the water pump (10) is connected with the water storage tank (11), a water outlet of the water pump (10) is connected with a water inlet of the experiment pipeline, a flow sensor (8) is arranged at the water inlet of the experiment pipeline, and a water outlet of the experiment pipeline is connected with the water storage tank (11) to form a water loop; the upper part of a cuboid frame (7) is a cylindrical experimental cavity (2), the cylindrical experimental cavity (2) is divided into an upper part and a lower part, the upper part and the lower part are separated by a partition plate, a first pressure sensor (1) is arranged at the upper part of the cylindrical experimental cavity (2) and used for measuring the atmospheric pressure of the experimental cavity, experimental soil (6) and experimental containers are arranged at the lower part of the cylindrical experimental cavity (2), a soil humidity sensor (3) is arranged in each container, a jet pump (9) can extract water in a water loop in the operation process of a water pump (10) and convey the water to wet the experimental soil (6) in the cylindrical experimental cavity (2) and form vacuum negative pressure to generate suction, a stable test environment is provided for an experiment, and a second pressure sensor (16) arranged above the cuboid frame (7) measures the pressure generated by the jet pump (9) forming the vacuum negative pressure; the left side of the control acquisition unit (31) is provided with a sensor aviation plug (23), the middle of the control acquisition unit is provided with a circuit breaker (24), the right side of the control acquisition unit is provided with a USB interface (25) and a power switch (26), and students can control the starting and stopping of the water pump by using a computer through the control acquisition unit (31).

2. The soil water-retention detection and calculation teaching device of claim 1 wherein: control acquisition unit (31) control water pump (10) operation, control acquisition unit (31) front evenly distributed several aviation plug interface, with soil moisture sensor (3) in the experimental unit, flow sensor (8), first pressure sensor (1) and second pressure sensor (16) are connected, the inside data processing module that is equipped with of control acquisition unit (31), arrange data in order, with data transmission to the computer through USB interface (25), the computer can show the humidity of soil and pressure sensor's numerical value, and generate soil moisture characteristic curve, water retention nature is represented to soil moisture and soil moisture characteristic curve's change.