CN103592177B - Fluid-wall interaction model test water level auto control system - Google Patents

Abstract

The invention discloses an automatic water level control system for a fluid-solid coupling model test, comprising: a water level monitor, a controller, a water replenisher and a real-time display device; the water level monitor, the water replenisher and the real-time display device are respectively connected to the controller The water level monitor comprises a floating scale and a grating scale displacement sensor, and the floating scale is connected with the reading head of the grating scale displacement sensor, and drives the reading head to move by floating the scale scale, and the pulse signal of the grating scale displacement sensor reflects the height of the water level; The controller controls the water replenisher to adjust the water level by collecting the data signal of the water level monitor. Beneficial effects of the present invention: the system can monitor and control the water level in real time to ensure the authenticity and accuracy of the test results; realize complete automation and reduce labor input in the test.

Description

Fluid-solid coupled model test water level automatic control system

technical field

The invention relates to a model test device, in particular to a water level automatic control system in geomechanics model tests.

Background technique

With the development of my country's economy and science and technology, submarine tunnels crossing faults, cross-river tunnels, and deep-buried large-section tunnels in karst areas are becoming more and more common in transportation construction. The impact of water on the successful construction of these projects is also very significant. Many technical issues urgently need to be resolved. Many experts hope to realize the simulation of on-site working conditions through model tests, and draw conclusions to guide the safe and smooth progress of on-site construction.

In the fluid-solid coupling model test, the top water storage is often used for hydraulic loading, and the hydrostatic pressure is adjusted by controlling the height of the water surface to meet the water pressure requirements of the test. In the traditional model test technology, manual observation is mainly used, and the water level adjustment is realized by manually opening and closing the faucet, which is time-consuming and labor-intensive, and the efficiency and degree of automation are relatively low.

Contents of the invention

The purpose of the present invention is exactly in order to solve the above-mentioned problem, has proposed a kind of system that can monitor and control the water level in real time in the model test, this system makes the monitoring and control of the water level in the fluid-solid coupling model test more accurate, compared with the previous test at the same time In the middle of the situation, it saves manpower and has high efficiency.

In order to achieve the above object, the present invention adopts the following technical solutions:

An automatic water level control system for a fluid-solid coupling model test, comprising: a water level monitor, a controller, a water replenisher and a real-time display device; the water level monitor, the water replenisher and the real-time display device are respectively connected to the controller; the water level The monitor includes a floating scale and a grating scale displacement sensor, the floating scale is connected with the reading head of the grating scale displacement sensor, and the reading head is moved by floating the scale, and the pulse signal of the grating scale displacement sensor reflects the height of the water level; the controller passes The data signal of the water level monitor is collected, and the water replenisher is controlled to adjust the water level.

The controller is a programmable single-chip microcomputer, and the controller collects and analyzes the signal of the water level monitor, and controls the water replenisher and the real-time display device.

The main ruler of the grating ruler displacement sensor is fixed on the top of the model frame through a bracket.

The real-time display device is composed of a digital display box, which displays the set water level and the actual water level in real time.

The water replenisher includes a water filling pump and a drainage water pump. When the actual water level is lower than the set water level, the controller controls the water adding pump to add water. When the actual water level is higher than the set water level, the controller controls the drainage water pump to drain water.

The beneficial effects of the present invention are:

1. The system can be widely used in all fluid-solid coupling model tests that use top storage for hydrostatic pressure loading, and the application range is relatively wide.

2. The system can monitor and control the water level in real time to ensure the authenticity and accuracy of the test results.

3. The system can display the water level information on the real-time display device, so that the experimenter can know the water level at any time.

4. The system realizes complete automation, which reduces the labor input in the test.

Description of drawings

Fig. 1 is the structural representation of automatic water level control system of the present invention;

Fig. 2 is a structural schematic diagram of the water level monitor of the present invention.

Among them, 1. Controller, 2. Water level monitor, 3. Real-time display device, 4. Add water pump, 5. Drain water pump, 6. Water replenisher, 7. Main scale, 8. Reading head, 9. Floating scale.

detailed description:

Below in conjunction with accompanying drawing and embodiment the present invention will be further described:

In Fig. 1, an automatic water level control system for fluid-solid coupling model test is composed of a controller 1, a water level monitor 2, a real-time display device 3 and a water replenisher 6. The controller 1 is composed of a single-chip microcomputer, which analyzes and processes the signal sent by the water level monitor 2, and controls the water replenisher 6 to take corresponding measures to adjust the water level, and displays the water level information on the real-time display device 3 at the same time. The real-time display device 3 is composed of a digital display box, is economical and applicable, and is controlled by the controller 1 to read and display the set water level and the actual water level in real time. The water replenisher 6 is composed of two small water pumps and corresponding water delivery pipes, one is responsible for adding water, and the other is responsible for draining water, so as to ensure the stability of the water level and provide guarantee for the accuracy of the test data.

As shown in FIG. 2 , the water level monitor 2 is composed of a floating scale 9 and a grating scale displacement sensor. The grating scale displacement sensor is divided into two parts: the main scale 7 and the reading head 8 . The main scale 7 of the grating scale displacement sensor is fixed on the top of the model test bench through a bracket, the floating ball at the lower part of the floating scale floats on the water surface, and the upper part is welded with the reading head 8 of the grating scale displacement sensor, and the change of the water level causes the floating scale 9 to move to drive the reading head 8 moves, and then converts it into a pulse signal and sends it to the real-time display device 3 and the controller 1 for water level display and control.

The method of using the water level automatic control system of the fluid-solid coupling model test includes:

(1) After the filling of the model body is completed, fix the main scale of the grating scale displacement sensor on the top of the model test bench through the bracket, and weld the floating scale and the reading head of the grating scale displacement sensor to ensure that the reading head is at the lowest water level Slide to the bottom of the main scale. When the float is at the highest water level, the reading head is located at the top of the main scale, and each has a movable adjustment distance of about 5cm. And connect the lead wires of the reading head to the real-time display device 3 and the controller 1 respectively.

(2) Connect the two water pumps of the water replenisher 6 with the filling and draining pipes, one end of the water filling port is connected to the faucet, and one section is fixed inside the water storage part on the top of the model test frame. One end of the drain pipe is on the inside of the drainage pool, and the other end is fixed on the inside of the water storage part on the top of the model test frame, but the water pipe mouth is close to the top surface of the model body.

(3) Hang the real-time display device 3 on a conspicuous and easy-to-observe position on the model test frame.

(4) Connect each part with connecting wires to ensure correct and smooth connection.

(5) Add water to the inside of the model frame to debug the automatic water level control system. After the commissioning is completed, the experimental test can be carried out.

Although the specific implementation of the present invention has been described above in conjunction with the accompanying drawings, it does not limit the protection scope of the present invention. Those skilled in the art should understand that on the basis of the technical solution of the present invention, those skilled in the art do not need to pay creative work Various modifications or variations that can be made are still within the protection scope of the present invention.

Claims (3)

1. A fluid-solid coupling model test water level automatic control system is characterized in that, comprising: a water level monitor, a controller, a water replenisher and a real-time display device; The water level monitor includes a floating scale and a grating scale displacement sensor, the floating scale is connected with the reading head of the grating scale displacement sensor, the floating scale drives the reading head to move, and the pulse signal of the grating scale displacement sensor reflects the height of the water level ; The controller controls the water replenisher to adjust the water level by collecting the data signal of the water level monitor; The main ruler of the grating ruler displacement sensor is fixed on the top of the model frame by a bracket; The water replenisher includes a water filling pump and a drainage water pump. When the actual water level is lower than the set water level, the controller controls the water adding pump to add water. When the actual water level is higher than the set water level, the controller controls the drainage water pump to drain water. 2. a kind of fluid-solid coupling model test water level automatic control system as claimed in claim 1, is characterized in that, described controller is programmable single-chip microcomputer, and described controller collects and analyzes the signal of water level monitor, And control the water replenisher and the real-time display device. 3. A fluid-solid coupling model test water level automatic control system as claimed in claim 1, wherein said real-time display device is composed of a digital display box to display the set water level and the actual water level in real time.