CN108226001A - A kind of bicyclic method automatic test device and bicyclic water injection test method - Google Patents

Abstract

The invention relates to the technical field of soil permeability coefficient detection, and discloses a double-loop automatic test device and a double-loop water injection test method. The double-loop automatic test device includes a double-loop component, a first water delivery component for supplying water to the water injection space of the inner ring, and a double-loop automatic test device. A second water conveying assembly, a distance sensor and a controller for supplying water between the inner and outer rings. The inner ring is provided with a piston, and the piston can rise or fall according to the change of the water volume in the water injection space. The distance sensor is used to detect the distance of the inner ring piston so as to judge the height position of the piston, and transmit the interval distance to the controller, and the controller controls the opening or closing of the first valve on the first water delivery assembly to adjust the water level. The double loop water injection test method involves testing using the apparatus described above. The device and method of the invention can automatically control the water level in the inner ring within a certain range, which ensures the accuracy of the experiment and reduces the manpower consumption of manually controlling the water level.

Description

A double-loop automatic test device and double-loop water injection test method

technical field

The invention relates to the technical field of soil permeability coefficient detection, in particular to a double-loop automatic test device and a double-loop water injection test method.

Background technique

The double-ring method test is a common and simple method to measure the permeability coefficient of the unsaturated unconsolidated rock formation in the vadose zone in the field, and the test results are closer to the actual situation. The experiment was mainly carried out to study regional water balance, reservoirs, irrigation areas, channel seepage, and surface water infiltration in piedmont areas. The double-ring method test is mainly calculated by detecting the seepage velocity of the soil layer under a certain surface water pressure. In the existing double-loop test, the tester manually controls the water level to maintain the water pressure at the surface of the soil layer, and records the amount of infiltration in multiple periods of time, so as to calculate the average flow rate in each period of time. This is time-consuming and labor-intensive, and data recording is also troublesome; and the accuracy of water level control is limited, and the test results are not accurate enough.

Contents of the invention

The purpose of the present invention is to provide a double-loop automatic test device, which can automatically detect the height of the inner ring water level and adjust to maintain the stability of the inner ring water level, while automatically recording flow data, saving time and effort and reducing experimental errors.

Another object of the present invention is to provide a double-loop water injection test method, which uses the above-mentioned automatic test device for double-loop method for testing, which saves time and effort and has high testing accuracy.

Embodiments of the present invention are achieved like this:

A double-loop automatic test device, which comprises:

Double-ring assembly, the double-ring assembly includes a cylindrical inner ring, a cylindrical outer ring coaxially arranged with the inner ring, and a piston arranged on the inner ring, the peripheral side of the piston is in sealing contact with the inner surface of the inner ring, and can The ring slides, and one end of the piston forms a water injection space with the inner ring;

The first water delivery assembly, the first water delivery assembly includes a first water pipe and a first valve arranged on the first water pipe, the opening of the first valve is adjustable, and the first water pipe is used to introduce water from the water source into the inner ring for water injection in space;

The second water delivery assembly, the second water delivery assembly includes a second water pipe and a second valve disposed on the water pipe; the second water pipe is used to introduce water from the water source between the inner ring and the outer ring;

a distance sensor for detecting the position of the piston and outputting a distance signal; and

controller;

Both the distance sensor and the first valve are electrically connected to the controller, and the controller is configured to receive the distance signal collected by the distance sensor and control the opening of the first valve.

In one embodiment of the present invention, the distance sensor of the above-mentioned double-ring method automatic test device is an ultrasonic sensor, and the distance sensor is arranged directly above the inner ring and is used to detect the distance between the piston and the measuring head of the distance sensor.

In one embodiment of the present invention, the water injection end of the first water pipe of the above-mentioned double-loop automatic test device passes through the piston and enters the water injection space, the contact surface between the piston and the first water pipe is sealed, and the piston can be closed relative to the first water pipe. slide.

In one embodiment of the present invention, a first sealing ring is provided between the piston and the inner ring of the above-mentioned double-ring automatic test device, and a second sealing ring is provided between the piston and the first water pipe.

In one embodiment of the present invention, the piston of the above-mentioned double-loop automatic test device is provided with an adsorption part made of magnetic material, an electromagnet is provided above the piston, and the electromagnet is electrically connected to the controller. At this time, it can generate an attractive force on the adsorption part.

In one embodiment of the present invention, the piston of the double-loop automatic test device has an exhaust port and a cover, the exhaust port is connected to the water injection space, and the cover is used to close the exhaust port.

In one embodiment of the present invention, the first water delivery assembly of the above-mentioned double-loop automatic test device also includes a first flowmeter arranged in the first water pipe, the first flowmeter is electrically connected to the controller, and the controller can record the first Flow information of a water pipe.

In one embodiment of the present invention, the above-mentioned double-loop automatic test device further includes a bracket, and the distance sensor is fixed on the bracket.

The present invention also provides a double-loop water injection test method, using the above-mentioned double-loop method automatic test device for testing, the double-loop water injection test method includes:

The inner ring and the outer ring are coaxially inserted into the soil layer, and one end of the water injection space is closed by the soil layer;

Using the first water delivery assembly and the second water delivery assembly to add water into the water injection space, between the inner ring and the outer ring, and collect the distance between the piston and the distance sensor through the distance sensor;

When the separation distance is greater than the first preset value, the controller opens the first valve, and when the separation distance is smaller than the second preset value, the controller closes the first valve; the first preset value is greater than the second preset value.

In one embodiment of the present invention, during the process of shrinking the separation distance in the above-mentioned double-ring water injection test method, an upward compensation force is applied to the piston, and the compensation force is equal to twice the sliding friction force when the piston moves in the inner ring .

The beneficial effects of the embodiments of the present invention are:

The double-loop automatic test device of the embodiment of the present invention includes a double-loop assembly, a first water delivery assembly for supplying water to the water injection space of the inner ring, a second water delivery assembly for supplying water between the inner and outer rings, a distance sensor and a controller. The inner ring is provided with a piston, and one end of the piston forms a water injection space with the inner ring. After the double ring assembly is inserted into the soil layer, the piston can rise or fall with the change of the water volume in the water injection space. The distance sensor is used to detect the distance of the inner ring piston so as to judge the height position of the piston, and transmit the distance to the controller, and the controller is electrically connected to the first valve on the first water delivery assembly. When the separation distance is greater than the first preset value, the controller opens the first valve, the amount of water in the water injection space increases, and the piston moves upward; when the separation distance is smaller than the second preset value, the controller closes or reduces the first valve, and this At this time, the water injection space begins to decrease gradually, and the piston gradually falls back. In this way, the water level in the inner ring can be automatically controlled within a certain range, ensuring that the water pressure at the bottom of the inner ring is relatively stable, ensuring the accuracy of the experiment, and reducing the labor consumption of manually controlling the water level.

The double-ring water injection test method of the embodiment of the present invention utilizes the above-mentioned double-ring method automatic test device, including inserting the inner ring and the outer ring coaxially into the soil layer; using the first water delivery assembly and the second water delivery assembly to inject water Water is added into the space, between the inner ring and the outer ring, and the distance between the piston and the distance sensor is collected by the distance sensor; when the distance is greater than the first preset value, the controller opens the first valve; when the distance is smaller than the second preset When setting the value, the controller closes the first valve; the first preset value is greater than the second preset value. This method adjusts and controls the height of the water level through a distance sensor and a controller, has high experimental precision, and saves manpower.

Description of drawings

In order to illustrate the technical solutions of the embodiments of the present invention more clearly, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention, and thus It should be regarded as a limitation on the scope, and those skilled in the art can also obtain other related drawings based on these drawings without creative work.

Fig. 1 is the structural representation of double-ring method automatic test device in the embodiment of the present invention;

Fig. 2 is a schematic structural view of a double ring assembly in an embodiment of the present invention;

Fig. 3 is an enlarged view of part III in Fig. 1;

FIG. 4 is a schematic diagram of the circuit connection of each device in the embodiment of the present invention.

Icons: 100-double-ring automatic test device; 110-inner ring; 112-piston; 113-exhaust port; 114-cover; 115-water injection space; 116-adsorption part; 118-first sealing ring; Ring; 122-bracket; 124-fixer; 130-controller; 140-water storage device; 150-first water pipe; 152-first valve; 154-first flow meter; 160-second water pipe; Two valves; 156-distance sensor; 164-water level sensor; 170-display equipment; 180-electromagnet; 190-soil layer.

Detailed ways

In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. The components of the embodiments of the invention generally described and illustrated in the figures herein may be arranged and designed in a variety of different configurations.

Accordingly, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

It should be noted that like numerals and letters denote similar items in the following figures, therefore, once an item is defined in one figure, it does not require further definition and explanation in subsequent figures.

In the description of the embodiments of the present invention, it should be noted that the orientations or positional relationships indicated by the terms "upper", "lower", "vertical", "horizontal", "inner" and "outer" are based on the drawings The orientation or positional relationship shown, or the conventional orientation or positional relationship of the invention product in use, is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific Orientation, construction and operation in a particular orientation, therefore should not be construed as limiting the invention. In addition, the terms "first", "second", etc. are only used for distinguishing descriptions, and should not be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal", "vertical" and the like do not imply that a component is absolutely level or overhanging, but may be slightly inclined. For example, "horizontal" only means that its direction is more horizontal than "vertical", and it does not mean that the structure must be completely horizontal, but can be slightly inclined.

In the description of the embodiments of the present invention, it should also be noted that, unless otherwise specified and limited, the terms "setting" and "connection" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection , or integrally connected; it may be mechanically connected or electrically connected; it may be directly connected or indirectly connected through an intermediary, and it may be the internal communication of two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the embodiments of the present invention in specific situations.

Example

FIG. 1 is a schematic structural diagram of a double-loop automatic test device 100 in an embodiment of the present invention; FIG. 4 is a schematic diagram of circuit connections of various devices in an embodiment of the present invention. Please refer to Fig. 1 and Fig. 4, the present embodiment provides a kind of double loop automatic test device 100, and it comprises water storage device 140, double loop assembly, first water delivery assembly, second water delivery assembly, distance sensor 156, water level sensor 164 and a controller 130 .

Fig. 2 is a schematic structural diagram of a double ring assembly in an embodiment of the present invention. Please refer to Fig. 1 and Fig. 2, double ring assembly comprises inner ring 110, outer ring 120 and the piston 112 that is arranged in inner ring 110, both outer ring 120 and inner ring 110 are cylindrical, both are used for inserting coaxially to the soil layer 190 and together with the soil layer 190 to form two water storage areas, the water permeates under the soil layer 190 in the inner ring 110 and between the inner ring 110 and the outer ring 120 . The piston 112 can slide along the axis of the inner ring 110 , and the piston 112 , the inner surface of the inner ring 110 and the surface of the soil layer 190 together form a water injection space 115 . The first water transfer assembly introduces the water of the water storage device 140 into the water injection space 115, and the second water transfer assembly introduces the water of the water storage device 140 between the inner ring 110 and the outer ring 120; the distance sensor 156 detects the height position of the piston 112 , the water level sensor 164 is used to detect the water level between the inner ring 110 and the outer ring 120, and the two sensors transmit data to the controller 130, and the controller 130 will adjust the first water conveying assembly and the second water transfer assembly according to the water level or the position information of the piston 112. The valves of the second water delivery component are opened and closed to adjust the water levels in the two areas to maintain within the target range.

It should be understood that the two sensors and the controller 130 are powered by a battery (not shown) or an external power supply (not shown), and the controller 130 is electrically connected to the distance sensor 156 , the water level sensor 164 and the valve respectively. In other embodiments of the present invention, the water level between the outer ring 120 and the inner ring 110 can be manually controlled without setting the water level sensor 164. The heights are equal, so that the water level of the outer ring 120 can be automatically discharged when it exceeds the preset water level; a vertical ruler can also be used to observe the water level with human eyes, and manually control the water intake of the second water delivery component to control the water level.

In this embodiment, in order to better fix the inner ring 110 and the outer ring 120 coaxially, the inner ring 110 and the outer ring 120 are fixed by welding a cross fixing piece 124 so that the two are always coaxial. A bracket 122 is disposed above the fixing member 124 , and the bracket 122 is used for installing the distance sensor 156 and the water storage device 140 . In this embodiment, the diameters of the inner ring 110 and the outer ring 120 are 25 cm and 50 cm respectively, and this size can be changed according to actual conditions in other embodiments.

The first water delivery assembly includes a first water pipe 150, a first valve 152 disposed on the first water pipe 150, and a first flow meter 154. In this embodiment, the first valve 152 is an electromagnetic valve with an adjustable opening. The water pipe 150 is used for introducing water from a water source into the water injection space 115 in the inner ring 110 . The second water delivery assembly includes a second water pipe 160 and a second valve 162 disposed on the water pipe; the second water pipe 160 is used to introduce water from a water source between the inner ring 110 and the outer ring 120 .

Fig. 3 is an enlarged view of part III in Fig. 1 . In this embodiment, the first sealing ring 118 is used to seal between the peripheral side of the piston 112 and the inner surface of the inner ring 110, and the piston 112 is also provided with an exhaust port 113, so that the gas in the water injection space 115 can be exhausted. Allow water to fill the entire water injection space 115 . The height of the upper surface of the piston 112 minus the thickness of the piston 112 is the water level in the water injection space 115 . The water injection end of the first water pipe 150 enters the water injection space 115 through the piston 112, and the contact surface between the piston 112 and the first water pipe 150 is sealed by a second sealing ring (not shown), and the piston 112 can be relatively opposite to the first water pipe 150. Sliding, it should be understood that the part where the first water pipe 150 slides with the piston 112 is a rigid straight pipe, which may be made of stainless steel. In order to prevent the water outlet of the first water pipe 150 from directly impacting the soil layer 190, the water outlets are multiple through holes arranged on the side wall of the pipe, and the lower end of the first water pipe 150 is closed.

Please refer to Fig. 1, Fig. 3 and Fig. 4, in this embodiment, since the piston 112 has a certain gravity, when it moves down with the drop of the water level, the additional pressure generated by the water in the water injection space 115 is gravity (rear The text is denoted by G) minus the sliding friction force during movement (the sum of the friction forces between the piston 112, the inner ring 110 and the first water pipe 150, denoted by F hereinafter), that is GF. Then, in order for the water pressure at the bottom of the double ring assembly to reach the target value, when determining the target height position of the upper surface of the piston 112, the additional force GF exerted by the piston 112 on the water should be considered. In this embodiment, G>F, so the piston 112 can overcome the friction force only by its own weight. The actual water pressure P _drop at the bottom of the water injection space 115 should be ρg(Hd)+(GF)/S, where S is the cross-sectional area of the water injection space 115, ρ is the water density, and H is the distance between the upper surface of the piston 112 and the soil layer 190 , d is the thickness of the piston 112, and g is the acceleration due to gravity. It should be noted that the actual water pressure here is the water pressure at the bottom of the water injection space 115 during the descent of the piston 112 .

When the piston 112 descends and the distance detected by the distance sensor 156 is greater than the first preset value, the first valve 152 is opened, the liquid level in the water injection space 115 rises, and the additional pressure applied by the piston 112 to the water body is G+F. The actual water pressure P at the bottom of the space 115 _{rises to} ρg(Hd)+(G+F)/S. It can be seen that at the same water level, the difference between when the piston 112 rises and when the piston 112 descends is 2F. In order to make the water pressure have a unique value corresponding to the water level no matter when the liquid level rises or falls, when the piston 112 rises, an upward compensation force of 2F is provided to the piston 112 . Therefore, in this embodiment, a suction portion is provided on the piston 112 , the suction portion is an annular iron block disposed on the upper surface of the piston 112 , and the suction portion is concentric with the piston 112 . An electromagnet 180 is also arranged on the support 122, and the electromagnet 180 is electrically connected with the controller 130. When the detection distance obtained by the distance sensor 156 is greater than the first preset value, the first valve 152 is opened and the electromagnet 180 is opened simultaneously (energized). ), so that the attraction force of the electromagnet 180 to the attracting part is equal to 2F; when the detection distance is less than the second preset value, the second valve 162 is closed and the electromagnet 180 is closed (power off), and the piston 112 starts again as the liquid level drops. Move down, so that the water pressure at the bottom of the water injection space 115 is maintained within a preset range. It should be understood that the attractive force of the electromagnet 180 can be controlled by adjusting the magnitude of the current and the distance from the attractive part. In practical applications, by adjusting the difference between the first preset value and the second preset value and the height of the electromagnet 180, the range of motion of the piston 112 can be set to be much smaller than the distance between the attracting part and the electromagnet. 112 During the moving process, the magnitude of the attractive force can be approximately regarded as a constant 2F.

In this implementation, the distance sensor 156 is an ultrasonic range finder, and its measuring head faces the upper surface of the piston 112 vertically downward, and is used to detect the distance between the upper surface of the piston 112 and the distance sensor 156, and then according to the measured distance measured in advance, According to the distance between the head and the soil layer 190, the distance H between the upper surface of the piston 112 and the soil layer 190 can be calculated. It should be understood that in other embodiments of the present invention, the distance sensor 156 may also be other types of distance measuring sensors, such as reflective infrared sensors.

In this embodiment, the water level sensor 164 is also disposed on the bracket 122 . The type of the water level sensor 164 is the same as the distance sensor 156 , and it measures the distance between the water surface between the inner ring 110 and the outer ring 120 and the water level sensor 164 . The water level sensor 164 feeds back the distance information to the controller 130, and the controller 130 is electrically connected to the second valve 162, and can control the water level in the area within a target range. The linkage mode of the water level sensor 164, the controller 130 and the second valve 162 is similar to the linkage mode of the distance sensor 156, the controller 130 and the first valve 152, also by detecting the water level and controlling it between two preset values , and the target value is also between these two preset values. In this way, the water pressure at the bottom of the water injection space 115 is controlled to be equal to the water pressure at the bottom between the inner ring 110 and the outer ring 120 .

In this embodiment, the water storage device 140 is disposed on the support 122 , and its lower end is connected to the first water pipe 150 and the second water pipe 160 . The first flow meter 154 is electrically connected to the controller 130 . The controller 130 may be a device such as a single chip microcomputer, a PLC, or a computer. In some other embodiments, a flow meter may also be set on the second water pipe 160 . In other optional embodiments of the present invention, a submersible pump (not shown) may be provided in the water storage device 140, and one end of the first water pipe 150 extends into the water storage device 140 and communicates with the outlet of the submersible pump. Therefore, the submersible pump can pump the water in the water storage device 140 to the first water pipe 150 to provide power. Correspondingly, the submersible pump is electrically connected with the controller 130, so that when the first valve 152 is opened, the controller 130 starts the submersible pump to deliver water, and when the first valve 152 is closed, the submersible pump stops working.

In this embodiment, the first flowmeter 154 records the flow rate of the first water pipe 150 every time the water is injected, and the controller 130 stores and calculates the data, and can obtain the average flow rate of multiple time periods, and use it as the original test result. data. The permeability of the evaluation soil layer 190 can be calculated from the flow data.

In some other embodiments of the present invention, the water storage device 140 can also be set on the ground instead of the support 122, so a water pump can be set on the first water pipe 150 and the second water pipe 160 to supply water to the two water pipes. The water provides power, and the water pump is electrically connected with the controller 130 to be automatically controlled.

It should be understood that in this embodiment, the controller 130 is also electrically connected to a display device 170 to display traffic information in different time periods.

The working principle of the double-loop automatic test device 100 of the present embodiment:

Insert the double ring assembly into the soil layer 190 to be tested, align the distance sensor 156 with the piston 112 of the inner ring 110 , and align the water level sensor 164 with the area between the inner ring 110 and the outer ring 120 . Water is injected into the water injection space 115 and between the inner ring 110 and the outer ring 120 , the distance sensor 156 and the water level sensor 164 are turned on, and the two sensors transmit data to the controller 130 in real time. When the detection distance obtained by the distance sensor 156 is greater than the first preset value, the controller 130 controls the first valve 152 to open; when the detection distance obtained by the distance sensor 156 is less than the second preset value, the controller 130 controls the first valve 152 closure. When the water level sensor 164, the second valve 162 and the controller 130 cooperate in a similar manner, the water levels of the inner ring 110 and the outer ring 120 are all controlled within the preset range, so that the bottom water of the inner ring 110 and the outer ring 120 can pressure is within a close range. During the whole test process, the controller 130 can also record flow data, and the experimenter can calculate the permeability of the soil layer 190 through these flow data. Such double-loop automatic test device 100 greatly reduces the labor cost of manually adjusting the water level and recording the flow rate, and can well ensure the accuracy of the test.

The present embodiment also provides a double-loop water injection test method, which utilizes the above-mentioned double-loop automatic test device 100, which includes:

Digging a water injection test pit, and leveling the soil layer 190 at the bottom of the pit, inserting the cylindrical inner ring 110 and the cylindrical outer ring 120 coaxially into the soil layer 190 by 5 cm;

Use the first water delivery assembly and the second water delivery assembly to add water between the water injection space 115, the inner ring 110 and the outer ring 120 respectively, detect and collect distance information through the distance sensor 156 and the water level sensor 164 and transmit it to the controller 130, use The controller 130 controls the first valve 152 and the opening of the second valve 162 to adjust the water delivery rate. When the detection distance obtained by the distance sensor 156 is greater than the first preset value, the controller 130 controls the first valve 152 to open; When the detection distance obtained at 156 is less than the second preset value, the controller 130 controls the first valve 152 to close. The water level sensor 164, the second valve 162 and the controller 130 cooperate in a similar manner, so that the water levels of the inner ring 110 and the outer ring 120 are all controlled within a preset range, and the bottom water pressure in the inner ring 110 and the outer ring 120 are maintained. It is equivalent to the bottom hydraulic pressure between the inner rings 110 . In this embodiment, the first preset value is 5cm, the second preset value is 4.5cm, and the corresponding water levels are 9.3cm and 9.8cm; the two preset values of the water level of the outer ring 120 are 9.5cm-10cm respectively.

The first flowmeter 154 transmits the flow information of the first water pipe 150 to the controller 130 for recording, and displays it on the display device 170. After starting the test, the experimenter records the average flow in the 5min period every 5min, and after recording 5 times , and record the average flow rate within the 30-min period every 30 minutes. If the difference between two consecutive flow data is less than 5%, stop the test and use the last flow data as the calculated value of soil infiltration capacity.

In summary, the double-loop automatic test device of the embodiment of the present invention includes a double-loop assembly, a first water delivery assembly for supplying water to the water injection space of the inner ring, a second water delivery assembly for supplying water between the inner and outer rings, a distance sensor and controller. The inner ring is provided with a piston, and one end of the piston forms a water injection space with the inner ring. After the double ring assembly is inserted into the soil layer, the piston can rise or fall with the change of the water volume in the water injection space. The distance sensor is used to detect the distance of the inner ring piston so as to judge the height position of the piston, and transmit the distance to the controller, and the controller is electrically connected to the first valve on the first water delivery assembly. When the separation distance is greater than the first preset value, the controller opens the first valve, the amount of water in the water injection space increases, and the piston moves upward; when the separation distance is smaller than the second preset value, the controller closes or reduces the first valve, and this At this time, the water injection space begins to decrease gradually, and the piston gradually falls back. In this way, the water level in the inner ring can be automatically controlled within a certain range, ensuring that the water pressure at the bottom of the inner ring is relatively stable, ensuring the accuracy of the experiment, and reducing the labor consumption of manually controlling the water level.

The double-ring water injection test method of the embodiment of the present invention utilizes the above-mentioned double-ring method automatic test device, including inserting the inner ring and the outer ring coaxially into the soil layer; using the first water delivery assembly and the second water delivery assembly to inject water Water is added into the space, between the inner ring and the outer ring, and the distance between the piston and the distance sensor is collected by the distance sensor; when the distance is greater than the first preset value, the controller opens the first valve; when the distance is smaller than the second preset When setting the value, the controller closes the first valve; the first preset value is greater than the second preset value. This method adjusts and controls the height of the water level through a distance sensor and a controller, has high experimental precision, and saves manpower.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims (10)

1. a kind of bicyclic method automatic test device, which is characterized in that the bicyclic method experimental provision includes：

Bicyclic component, the inner ring of the bicyclic component including tubular, the tubular being coaxially disposed with the inner ring outer shroud and set It is placed in the piston of the inner ring；The side of the piston and the medial surface of the inner ring are in sealing contact, and can be relative to described Inner ring is slided, and one end of the piston forms water filling space with the inner ring；

First water delivery component, the first water delivery component include the first water pipe and are set to the first valve of first water pipe, The aperture of first valve is adjustable, and first water pipe is used to importing the water at water source into the water filling space in the inner ring It is interior；

Second water delivery component, the second water delivery component include the second water pipe and are set to the second valve of the water pipe；Institute The second water pipe is stated for the water at water source to be imported between the inner ring and the outer shroud；

For detecting the piston position, and export the range sensor of distance signal；And

Controller；

The range sensor, first valve are electrically connected with the controller, the controller for receive it is described away from The distance signal from sensor acquisition simultaneously controls the aperture of first valve.

2. bicyclic method automatic test device according to claim 1, which is characterized in that the range sensor is ultrasound Wave sensor, the range sensor are set to the surface of the inner ring and for detecting the piston and the Distance-sensing The distance of the gauge head of device.

3. bicyclic method automatic test device according to claim 1, which is characterized in that the water injection end of first water pipe The water filling space is entered across the piston, the contact surface sealing between the piston and first water pipe, the work Plug can be slided relative to first water pipe.

4. bicyclic method automatic test device according to claim 3, which is characterized in that the piston and the inner ring it Between be provided with the first sealing ring, be provided with the second sealing ring between the piston and first water pipe.

5. bicyclic method automatic test device according to claim 1, which is characterized in that be provided on the piston by magnetic Property adsorption section made of material is provided with electromagnet above the piston, and the electromagnet is electrically connected with the controller, institute Gravitation can be generated when being powered to the adsorption section by stating electromagnet.

6. bicyclic method automatic test device according to claim 1, which is characterized in that there are one arrange for tool on the piston Gas port and a capping, the exhaust outlet is communicated in the water filling space, described to cover to close the exhaust outlet.

7. bicyclic method automatic test device according to claim 1, which is characterized in that the first water delivery component also wraps The first flowmeter for being set to first water pipe is included, the first flowmeter is electrically connected with the controller, the controller It is able to record the flow information of first water pipe.

8. bicyclic method automatic test device according to claim 1, which is characterized in that the bicyclic method automation experiment Device further includes stent, and the range sensor is fixed on the stent.

A kind of 9. bicyclic water injection test method, which is characterized in that using the bicyclic method described in any one of claim 1 to 8 certainly Dynamicization experimental rig is tested, and the bicyclic water injection test method includes：

The inner ring and the outer shroud are coaxially inserted into soil layer, the one end in the water filling space is closed by the soil layer；

Using the first water delivery component and the second water delivery component respectively into the water filling space, the inner ring and described Water is added between outer shroud, the spacing distance of the piston and the range sensor is acquired by the range sensor；

When the spacing distance is more than the first preset value, the controller opens first valve, when the spacing distance During less than the second preset value, the controller closes first valve；First preset value is more than second preset value.

10. bicyclic water injection test method according to claim 9, which is characterized in that the spacing distance is in the mistake of diminution Cheng Zhong, applies the piston balancing force upward, and the balancing force is equal to the cunning when piston moves in the inner ring Twice of kinetic force of friction.