Measuring system and method for two-dimensional motion trajectory of rocks in debris flow model trough

Abstract

The present invention relates to a measurement system for the two-dimensional motion trajectory of stones in a debris flow model trough. The system device is composed of three subsystems, namely, a magnetic field transmitting system, a magnetic field receiving system, and a monitoring data processing system. The magnetic field transmitting system is buried in the stone model, and includes a magnet device with a certain magnetic field size and a self-weight sensor. The self-weight sensor ensures that the direction of the magnetic field will not change, and the two poles of the magnetic field are always perpendicular to the two side walls of the debris flow model trough. The magnetic field receiving system includes a closed wire array, an induction small light bulb array, and a track rotation system. The track rotation system enables the closed wire to cut the magnetic flux lines in the magnetic field, generating an induced current to make the small light bulb glow. The monitoring data processing system includes a high-speed camera, an analysis computer, and image analysis software. The high-speed camera records the luminescence degree of the small light bulb, and the photo is transmitted to the analysis computer. Based on the image analysis software, the change of the plane coordinate position of the stone model can be determined according to the luminescence degree of the area.

Description

Technical Field

[0001] The invention relates to a device for measuring the two-dimensional motion trajectory of stones in a debris flow model trough, and specifically refers to a device for measuring the two-dimensional trajectory of stones in a debris flow model trough. Background Art

[0002] Debris flow is characterized by strong suddenness, fast flow rate, large flow rate, large material capacity and strong destructive power. Debris flow often destroys transportation facilities such as roads and railways, and sometimes even destroys villages and towns, causing huge losses. How to effectively control debris flow has become a research hotspot. A large number of researchers have mastered the movement laws of debris flow and proposed targeted control measures by conducting debris flow model trough experiments. During the flow of debris flow, the movement trajectory of solid phase materials is the key observation object of the experiment. If the solid phase materials are only photographed and observed through the glass side wall of the debris flow model trough, the specific stones cannot be accurately tracked due to the influence of the liquid phase and the adjacent solid phase materials. In addition, the friction of the glass side wall will also affect the observation data. Establishing a measurement method for observing the movement trajectory of stones from the inside of the material is crucial to debris flow research and helps to establish an effective control method for debris flow. Summary of the invention

[0003] The main purpose of the present invention is to propose a system and method for measuring the two-dimensional motion trajectory of stones in a debris flow model trough. The device can accurately measure the motion trajectory of stones, and has a clear principle, simple construction, and easy construction operation.

[0004] The present invention adopts the following technical solution:

[0005] The measuring system of the two-dimensional motion trajectory of the rocks in the debris flow model trough includes: a magnetic field transmitting system, a magnetic field receiving system, and a monitoring data processing system;

[0006] The magnetic field emission system is buried in the surrounding rock medium and includes a magnet device with a certain magnetic field size and a deadweight sensor;

[0007] The magnetic field receiving system comprises a closed wire array, an induction light bulb array and a track rotation system, and the track rotation system is used to make the closed wire move in the magnetic field to cut the magnetic flux lines, thereby generating an induction current to make the light bulbs light up;

[0008] The monitoring data processing system includes a high-speed camera, an analysis computer and image analysis software. The high-speed camera takes pictures to record the luminous degree of the small bulb, and the pictures are transmitted to the analysis computer. Based on the image analysis software, the changes in the plane coordinate position of the stone model are determined according to the different luminous degrees of the regions.

[0009] In a preferred embodiment: the two poles of the magnet device are perpendicular to the two side walls of the debris flow model trough. When the stone model moves, due to the adjustment of the deadweight sensor, the two poles of the magnet device are always perpendicular to the two side walls of the debris flow model trough.

[0010] In a preferred embodiment: the closed wires are distributed in the middle of the two partitions according to a certain array, and the shape of the closed wires is a rectangular frame.

[0011] In a preferred embodiment: the crawler rotation system is used to drive the closed conductor array to rotate synchronously. The system realizes the synchronous rotation of each closed conductor through the crawler. Controlling the linear speed of the crawler can make all the closed conductors rotate synchronously at a uniform speed or synchronously with uniform acceleration.

[0012] In a preferred embodiment: the monitoring data processing system uses a high-speed camera to photograph the array of small light bulbs on the partition. During the falling process of the stone block, enough photos should be taken to completely record the movement trajectory of the stone block.

[0013] In a preferred embodiment: the image analysis analyzes the brightness distribution value on each photo by taking a series of digital photos, thereby determining the relatively brightest area of ​​the small bulb on the partition, and then determining the plane position of the stone model.

[0014] A method for measuring the two-dimensional motion trajectory of rocks in a new debris flow model trough as described above comprises the following steps:

[0015] Step 1: Conduct a simulation test in a debris flow model trough. Bury a magnet with a certain magnetic field strength in the stone model. When conducting a debris flow model experiment, the stone model will fall along the model trough.

[0016] Step 2: Arrange a closed wire array and an induction light bulb array on a plane outside the side wall of the debris flow model trough. Without changing the magnetic field strength, rotate the closed wire from slow to fast. The closed wire cuts the magnetic lines of force in the magnetic field, thereby generating an induced current. The brightness of the light bulb corresponding to the stone position in the induction light bulb array will reach the maximum value.

[0017] Step 3: By using an analysis computer and image analysis software to compare a series of photos taken by a high-speed camera, analyze the brightest area of ​​the bulb on the partition recorded in each photo, and then obtain a two-dimensional change path of the brightest area of ​​the bulb, and finally determine the change in the two-dimensional position of the stone model.

[0018] It can be seen from the above description of the present invention that, compared with the prior art, the present invention has the following beneficial effects:

[0019] Through simple physical experimental principles, this paper can effectively simulate and monitor the two-dimensional movement trajectory of stone models in debris flow channels, providing rich data support for theoretical research and helping to establish effective methods for debris flow control. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A perspective view of the present invention;

[0021] Figure 2 A top view of the present invention;

[0022] Among them: 1. Magnetic field transmitting system, 2. Magnetic field receiving system, 3. Monitoring data processing system, 11. Deadweight sensor, 12. Magnet device, 21. Track rotation system, 22. Closed wire array, 23. Induction small light bulb array. DETAILED DESCRIPTION

[0023] The present invention is further described below through specific implementation modes.

[0024] Reference Figure 1 and Figure 2 A system for measuring the two-dimensional motion trajectory of rocks in a debris flow model trough is provided. The system device is composed of three subsystems, a magnetic field transmitting system 1, a magnetic field receiving system 2, and a monitoring data processing system 3. The magnetic field transmitting system 1 includes a deadweight sensor 11 and a magnet device 12; the magnetic field receiving system 2 includes a crawler rotating system 21, a closed wire array 22, and an induction small light bulb array 23.

[0025] Reference Figure 2 , the magnetic field transmitting system 1 is buried in the stone model, the magnet device 12 makes the stone model have a certain magnetic field, and the self-weight sensor 11 makes the two poles of the magnet always perpendicular to the side wall of the debris flow trough. The closed wire array 22 is located between the two partitions, and the partitions are parallel to the side walls of the debris flow trough and a certain distance away from the side walls. The crawler rotation system 21 connects the closed wire arrays 22 one by one; the induction light bulb array 23 is arranged on the partition away from the model trough and corresponds to the closed wire array 22 one by one. When the stone model moves in the debris flow trough, the luminescence degree of the induction light bulb array 23 at different times is recorded, and a two-dimensional trajectory change diagram of the stone model is obtained through the monitoring data processing system 3.

[0026] The specific measurement method includes the following steps:

[0027] Step 1: Conduct a simulation test in a debris flow model trough. Bury a magnet with a certain magnetic field strength in the stone model. When conducting a debris flow model experiment, the stone model will fall along the model trough.

[0028] Step 2: Arrange a closed conductor array and an induction light bulb array 23 on a plane outside the side wall of the debris flow model trough. Without changing the magnetic field strength, rotate the closed conductor from slow to fast. The closed conductor cuts the magnetic flux lines in the magnetic field, thereby generating an induced current. The brightness of the light bulb corresponding to the stone position in the induction light bulb array 23 reaches the maximum value.

[0029] Step 3: By using an analysis computer and image analysis software to compare a series of photos taken by a high-speed camera, analyze the brightest area of ​​the bulb on the partition recorded in each photo, and then obtain a two-dimensional change path of the brightest area of ​​the bulb, and finally determine the change in the two-dimensional position of the stone model.

[0030] The above is only a preferred embodiment of the present invention and cannot be used to limit the scope of the present invention. That is, equivalent changes and modifications made according to the patent scope of the present invention and the content of the specification should still fall within the scope of the present invention.

Claims

1. A system for measuring the two-dimensional motion trajectory of rocks in a debris flow model trough, characterized by include: A magnetic field transmitting system, a magnetic field receiving system, and a monitoring data processing system; The magnetic field transmitting system is buried in the surrounding rock medium, and includes a magnet device with a certain magnetic field size and a deadweight sensor; The magnetic field receiving system includes a closed wire array, an induction light bulb array, and a crawler rotation system. The crawler rotation system is used to make the closed wire move in the magnetic field to cut the magnetic flux lines, generate an induced current, and make the light bulb glow; The monitoring data processing system includes a high-speed camera, an analysis computer, and image analysis software. The high-speed camera takes pictures to record the luminescence degree of the light bulb, and the pictures are transmitted to the analysis computer. Based on the image analysis software, the change in the plane coordinate position of the stone model is determined according to the different luminescence degrees of the area; The two poles of the magnet device are perpendicular to the two side walls of the debris flow model trough. When the stone model moves, due to the adjustment of the deadweight sensor, the two poles of the magnet device are always perpendicular to the two side walls of the debris flow model trough; The closed wire is distributed in the middle of the two partitions according to a certain array, and the shape of the closed wire is a rectangular frame; The belt rotation system is used to drive the closed conductor array to rotate synchronously. The system realizes the synchronous rotation of each closed conductor through the track. Controlling the linear speed of the track can make all the closed conductors rotate synchronously at a uniform speed or synchronously with uniform acceleration; the monitoring data processing system uses a high-speed camera to shoot the small light bulb array on the partition. During the falling process of the stone block, enough photos should be taken to completely record the movement trajectory of the stone block; image analysis analyzes the brightness distribution value on each photo through a series of digital photos taken, thereby determining the brightest area of ​​the small bulb on the partition, and then determining the plane position of the stone model.

2. A method for measuring the two-dimensional motion trajectory of rocks in a debris flow model trough based on the measurement system of claim 1, characterized in that The method comprises the following steps: Step 1: conducting a simulation test in a debris flow model trough, burying a magnet with a certain magnetic field strength in the stone model; when conducting the debris flow model experiment, the stone model will fall along the model trough; Step 2: arranging a closed wire array and an induction small bulb array on a plane outside the side wall of the debris flow model trough, and rotating the closed wire from slow to fast without changing the magnetic field strength. The closed wire cuts the magnetic flux lines in the magnetic field, thereby generating an induced current, and the brightness of the small bulb corresponding to the stone position in the induction small bulb array reaches the maximum value; Step 3: by analyzing a computer and image analysis software, comparing a series of photos taken by a high-speed camera, analyzing the brightest area of ​​the bulb on the partition recorded in each photo, and then obtaining a two-dimensional change path of the brightest area of ​​the bulb, and finally determining the change in the two-dimensional position of the stone model.

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