CN206146866U - Soil moisture content measuring device - Google Patents

Abstract

The utility model belongs to the technical field of geotechnical experiment measuring devices, in particular to a soil water content measuring device. Including a drying room and an electronic scale; there are a number of heaters in the inner wall of the drying room, and a number of air outlets on the inner wall; the drying room is divided into three compartments by partitions, and each compartment corresponds to There is an exhaust channel on the top wall; there are temperature sensors on the outer wall of the partition of each compartment, and each temperature sensor is connected to the temperature controller through wires. The temperature controller is located on the side of the drying room and connected to the heater. The trays of the three electronic scales are respectively arranged in the three compartments, each compartment is provided with a door, and the display device of the electronic scales is arranged outside the door; the top of the door is provided with a miniature camera device. By setting parallel drying chambers in this device, multiple groups of experiments can be carried out at the same time, which saves experiment time. At the same time, a remote monitoring device is added to realize remote monitoring of the experimental process, which is more convenient.

Description

Soil moisture content measuring device

technical field

The utility model belongs to the technical field of geotechnical experiment measuring devices, in particular to a soil water content measuring device.

Background technique

The water content of the soil refers to the ratio of the water mass lost when the soil is baked at a temperature of 105°C-110°C to a constant mass to the dry soil mass after reaching a constant mass, expressed as a percentage. Moisture content is one of the basic physical properties of soil, which reflects the dry and wet state of soil. The change of water content will cause a series of changes in the physical and mechanical properties of the soil. It can make the soil into a semi-solid, plastic state or flowing state, it can make the soil into a slightly wet state, a very wet state or a saturated state, and it can also cause Differences in compressibility and stability of soils. Water content is also an indispensable basis for calculating the dry density, void ratio, saturation, liquid index, etc. of soil, and is also an important index for construction quality control of building foundations, embankments, and earth dams.

At present, soil water content determination methods mainly include gravimetric method, neutron meter method, electrical resistance method, gamma ray projection method, TDR method and FDR method, etc. Among them, the gravimetric method refers to the method of obtaining the water content of the soil by dissipating all the free water in the soil moisture in the form of steam, and then weighing the weight. The gravimetric method is currently the most commonly used method for measuring soil moisture content. It is simple, easy to implement, and has sufficient accuracy. It is the basic method for soil moisture determination and the basis for testing other methods and comparing them.

The existing gravimetric method to measure the water content of soil is mostly determined by the drying method, but when the drying method is used for the measurement, the sampling should not be too much at one time, otherwise the long drying time and uneven drying will easily cause experimental errors, and the sampling Small quantities often require multi-point sampling and parallel experiments to obtain complete measurement data. The workload is often large, time-consuming, and experimental efficiency is low.

Utility model content

The technical problem solved by the utility model is that the existing gravimetric method for measuring the water content of soil mostly uses the drying method to measure, but when the drying method is used for measurement, the sampling at one time cannot be too much, otherwise the drying time will be long and the drying time will be too long. Inhomogeneity is likely to cause experimental errors, and the small amount of sampling often requires multi-point sampling and parallel experiments to obtain complete measurement data. The workload is often large, time-consuming, and experimental efficiency is low.

In order to solve the above problems, the utility model provides a soil moisture content measuring device. By setting parallel drying chambers, multiple groups of experiments can be carried out at the same time, which saves experiment time. At the same time, a remote monitoring device is added to realize remote monitoring of the experimental process. ,More convenient.

In order to achieve the above object, the utility model adopts the following technical scheme, a soil water content measuring device, including a drying chamber and an electronic scale; the drying chamber is a structure similar to an oven, and several The heater, the heater can be an electric heater such as a thermal resistance, an electric heating wire, etc., and several air outlets are provided on the inner wall, which communicate with the interlayer where the heater is located. The heat blows into the drying room to promote the temperature rise and the water evaporation; the drying room is divided into three compartments by the partition board, and each compartment is equipped with an exhaust channel on the corresponding top wall, and the exhaust channel and the exhaust fan Connected, three samples can be placed at the same time, saving experiment time, and at the same time, the exhaust channel will take away the evaporated water vapor in time, promote the evaporation of water in the soil sample, and improve the efficiency of the experiment; the outer wall of each compartment is equipped with Temperature sensor, the temperature sensor can be PT100 platinum resistance tester, each temperature sensor is connected to the temperature controller through wires, the temperature controller is located on the side of the drying room, connected to the heater, and the temperature control adopts the same channel of P.I.D+S.S.R system Coordinated control, temperature adjustment is carried out by means of heat balance temperature adjustment; the trays of the three electronic scales are respectively set in the three compartments, each compartment is equipped with a door, and the display device of the electronic scale 5 is set outside the door; the top of the door It is equipped with a micro-camera device, and the image-taking part of the micro-camera device is aligned with the display device. The wireless/limited signal transmitter inside the micro-camera device is connected to the computer, and the weight data on the electronic scale can be transmitted to the computer in time. The measurement process can be monitored on the computer. After the data is observed to be constant, it is enough to stop the device in the laboratory for heating, which eliminates the need to run back and forth for observation many times, and can make full use of the time between experiments for other experimental data processing, etc. Improve learning efficiency.

Further, the outer wall of the drying chamber is made of thermal insulation material to ensure the heating temperature and promote the evaporation of water.

Further, the door is a side-opening type, and a sealing ring is provided inside to ensure that the temperature in the drying chamber is not lost and the heating temperature is guaranteed.

Further, the tray is an iron plate placed on the bracket, which is detachably connected with the bracket, which is convenient for disassembly, cleaning and replacement.

The specific operation process is as follows:

During the experiment, clean up the tray and put it in the drying room, then reset it to zero, then put in the soil sample to be tested, turn on the micro camera, and record the initial data. If you forget to record the initial data, you can watch the video to re-record it later; then After closing the door of the drying chamber, set the drying temperature through the thermostat, start heating, and then observe the data of the soil sample to be tested through the computer, record the data after the weight is constant, stop heating, and clean the tray for the next use.

The utility model has the advantages of:

1. Equipped with multiple drying chambers, parallel tests can be carried out at the same time, which can ensure that the conditions of the parallel test are the same to the greatest extent except for the weight and sampling position, ensuring the accuracy of the experimental data and saving test time.

2. The experimental data can be transmitted to the computer through the micro-camera device, and the experimental process can be directly observed and recorded from the computer, which is more convenient and quicker. It can also be called when the experimental data is forgotten to ensure the smooth progress of the experiment.

Description of drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art.

Fig. 1 is the structural representation of the utility model;

Fig. 2 is a schematic diagram of the internal structure of the utility model drying chamber compartment;

In the figure, a drying chamber 1, an electronic scale 2, a heater 3, an exhaust passage 4, a door 5, and a miniature camera device 6.

detailed description

In order to make the purpose, technical solutions and advantages of the embodiments of the utility model more clear, the technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the utility model. Obviously, the described The embodiments are some embodiments of the present utility model, but not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

Example 1:

A soil water content measuring device, comprising a drying chamber 1, an electronic scale 2; Electric heaters such as resistors and electric heating wires have a number of air outlets on the inner wall, which communicate with the interlayer where the heater is located. The interlayer is connected to the blower outside the drying chamber 1, which can blow the heat generated by the heater into the drying chamber. , to promote the temperature rise and water evaporation; the drying chamber 1 is divided into three compartments on average by the partition, and an exhaust channel 4 is respectively provided on the corresponding top wall of each compartment, and the exhaust channel is connected with the exhaust fan, which can be simultaneously Three samples are placed to save the experiment time. At the same time, the exhaust channel will take away the evaporated water vapor in time to promote the evaporation of water in the soil sample and improve the experiment efficiency; the outer wall of the partition of each compartment is equipped with a temperature sensor. The sensor can be a PT100 platinum resistance tester. Each temperature sensor is connected to the temperature controller through wires. The temperature controller is located on the side of the drying room and connected to the heater 3. The temperature control adopts the same channel coordination control of the P.I.D+S.S.R system. The temperature is adjusted by means of heat balance temperature adjustment; the trays of the three electronic scales 2 are respectively arranged in three compartments, each compartment is provided with a door 5, and the display device of the electronic scale 5 is located outside the door 5; The top is provided with a miniature camera device 6, and the image-taking position of the miniature camera device 6 is aligned with the display device, and the wireless/limited signal transmitting device inside the miniature camera device 6 is connected with the computer, so that the weight data on the electronic scale can be transmitted to the computer in time. Computer, the experimenter can monitor the measurement process on the computer, and then go to the laboratory to stop heating the device after observing that the data is constant, eliminating the need to run back and forth for observation many times, and can make full use of the time between experiments for other experiments Data processing, etc., to improve learning efficiency.

The outer wall of the drying chamber 1 is made of thermal insulation material to ensure the heating temperature and promote the evaporation of water.

The tray is an iron plate placed on the bracket, which is detachably connected with the bracket for easy disassembly, cleaning and replacement.

Example 2:

The door 5 is a side-opening type, and a sealing ring is arranged inside to ensure that the temperature in the drying chamber is not lost and the heating temperature is guaranteed.

All the other are identical with embodiment 1.

The specific operation process is as follows:

During the experiment, clean up the tray and put it in the drying room, then reset it to zero, then put in the soil sample to be tested, turn on the micro camera, and record the initial data. If you forget to record the initial data, you can watch the video to re-record it later; then After closing the door of the drying chamber, set the drying temperature through the thermostat, start heating, and then observe the data of the soil sample to be tested through the computer, record the data after the weight is constant, stop heating, and clean the tray for the next use.

Claims (4)

1. A soil water content measuring device, characterized in that: comprising a drying chamber, an electronic scale; the inner wall of the drying chamber is provided with some heaters, the inner wall is provided with some air outlets, and the interlayer where the heater is located In communication, the interlayer is connected with the blower outside the drying room; the drying room is divided into three compartments by partitions, and each compartment is provided with an exhaust channel on the corresponding top wall, and the exhaust channel is connected with the exhaust fan. ; There are temperature sensors on the outer wall of the partition of each compartment, and each temperature sensor is connected to the temperature controller through wires, and the temperature controller is located on the side of the drying room and connected to the heater; In the three compartments, each compartment is equipped with a door, and the display device of the electronic scale is located outside the door; the top of the door is provided with a micro-camera device, and the image-taking part of the micro-camera device is aligned with the display device. The wireless/limited signal transmitting device inside the device is connected with the computer. 2. The soil water content measuring device according to claim 1, characterized in that: the outer wall of the drying chamber is made of thermal insulation material. 3. The soil water content measuring device according to claim 1, characterized in that: the door is a side-opening type, and a sealing ring is provided inside. 4. The soil water content measuring device according to claim 1, characterized in that: the tray is an iron plate placed on a bracket, and is detachably connected with the bracket.