FIELD INTEGRATED DEVICE FOR AUTOMATICALLY SHIELDING AND COLLECTING RAINWATER AND SIMULATING RAINFALL AND EXPERIMENTAL METHOD

The present disclosure provides a field integrated device for automatically shielding and collecting rainwater and simulating rainfall and an experimental method. The field integrated device comprises a roller shutter assembly. A rainfall assembly and a rainwater collecting assembly are fixed on the roller shutter assembly. The roller shutter assembly guides rainwater into the rainwater collecting assembly while shielding the rainwater. The rainfall assembly is connected with a pumping assembly. The pumping assembly transports the rainwater to the rainfall assembly to realize artificial rainfall simulation. The pumping assembly is fixed in a solar module. The solar module is electrically connected with the pumping assembly and a driving assembly in the roller shutter assembly. The solar module is in signal connection with a remote signal end.

CROSS-REFERENCE TO RELATED APPLICATION

This patent application claims the benefit and priority of Chinese Patent Application No. 2023101062589, filed with the China National Intellectual Property Administration on Jan. 31, 2023, the disclosure of which is incorporated by reference herein in its entirety as part of the present application.

TECHNICAL FIELD

The invention relates to the technical field of artificial rainfall simulation, in particular to a field integrated device for automatically shielding and collecting rainwater and simulating rainfall and an experimental method.

BACKGROUND

The artificial rainfall simulating experiment refers to an experimental method of simulating natural rainfall scenes under different increasing/decreasing conditions and observing soil erosion, runoff and sediment yield processes under different treatment conditions through artificial rainfall devices. The artificial rainfall simulating experiments can be divided into indoor artificial rainfall simulation experiments and field artificial rainfall simulation experiments. Compared with natural rainfall (nature rainfall), the artificial rainfall simulation experiment has the advantages of low time consumption, high efficiency, easy control, high adaptability and the like. At the same time, according to the experimental purpose, the combination of different experimental conditions and schemes can be carried out to obtain data not easy or difficult to observe under natural conditions.

Compared with the indoor artificial rainfall simulation experiment, the field artificial rainfall simulation experiment is closer to natural conditions, so the indoor artificial rainfall simulation experiment has higher experimental value. However, the field artificial simulation experiment also needs higher requirements for control conditions and use scenarios.

The existing field artificial rainfall simulating devices need high requirements on manpower, water and electricity resources (needing to be close to power supply and water sources), so that the use scenarios are limited, and the use of field experiments is limited in remote areas with incomplete hydropower resources. In addition, rainwater shielding is an important control condition for artificial rainfall control experiments. In the process of the artificial rainfall control experiment, it is often necessary to shield rainwater in a certain period to reduce the rainfall precipitation of the experimental ground, so that the purpose of controlled experiments under different rain increase/decrease conditions is achieved. However, at present, most of rainwater shielding devices must be temporarily erected by manpower before the experiment starts, and then removed after the rain stops. Most of rainwater shielding devices are poor in timeliness and highly dependent on manpower. If workers are absent, the experiment cannot be carried out smoothly, thus the ideal experimental cycle is missed, and the use scenarios of controlled precipitation experiments in remote areas in the wild are also limited.

SUMMARY

Aiming at the above problems in the prior art, the present disclosure provides a field integrated device for automatically shielding and collecting rainwater and simulating rainfall, and solves the problems that the existing field artificial rainfall simulating device can not be applied to remote and unmanned places and the applicable scene is limited.

In order to achieve the above purpose, the present disclosure adopts the following technical scheme.

In a first aspect, disclosed is a field integrated device for automatically shielding and collecting rainwater and simulating rainfall, including a roller shutter assembly. The roller shutter assembly includes a four-corner support with height difference. The high side of the four-corner support is connected with a mounting seat, and the low side of the four-corner support is respectively connected with two baffles. The two baffles are respectively oppositely fixed on the two ends of the mounting seat. The mounting seat is provided with a humidity sensitive element. The mounting seat is internally provided with a driving assembly and a roller shutter. The driving assembly is rotationally connected with the roller shutter. The driving assembly drives the curtain plate of the roller shutter to be unfolded and contracted between the two baffles. A rainfall assembly is fixed between the two baffles. The rainfall assembly is connected with a pumping assembly. The pumping assembly is connected with the bottom of a water storage tank. The upper part of the water storage tank is connected with a rainwater collector. The rainwater collector is fixed at the lower parts of the two baffles for collecting the rainwater on the roller shutter. The pumping assembly and the water storage tank are fixed on the solar stand of a solar module. The solar module is respectively electrically connected with the humidity sensitive element, the driving assembly and the pumping assembly. The solar module is in signal connection with a remote signal end.

In this scheme, the roller shutter is matched with the rainwater collecting assembly to collect natural rainwater. The collected natural rainwater is used for artificial rainfall simulation to realize artificial rainfall simulation in the field. The four-corner support is simple in structure, and also can raise the roller shutter, so that a gap is formed between the experimental ground and the curtain plate of the roller shutter, air can circulate naturally, the change of the device to the natural environment is reduced, and the experimental accuracy is improved.

Further, the roller shutter includes a drum, and the drum is connected with the driving assembly. One side of the curtain plate is fixedly connected with the drum, and the other side of the curtain plate is wound on the drum. Sliding chutes are formed in the two baffles. The two sliding chutes are arranged oppositely. Two sides of the free end of the curtain plate are respectively embedded in the two sliding chutes, and are unfolded and contracted in the sliding chutes.

Further, the driving assembly includes a first motor, and the first motor is fixed in mounting seat; and the output shaft of the first motor is rotationally connected with the drum through a first coupling, and the first motor is electrically connected with the solar module.

In this scheme, the solar module controls the starting and steering of the motor, and the forward rotation of the motor drives the drum to rotate to unfold the curtain plate in the sliding chute, so that the rain shielding function is realized. The reverse rotation of the motor drives the drum to rotate to shrink the curtain plate, so that the rain shielding function is turned off.

Further, the rainwater collector is a hollow cylinder. Both ends of the cylinder are respectively welded on the two baffles. A rainwater collecting port is formed in the middle of the cylinder. The two sliding chutes extend into the rainwater collecting port. A water outlet hole is formed in one end of the cylinder. The water outlet hole is connected with the water storage tank through a rainwater collecting pipe. The free end of the curtain plate extends into the rainwater collecting port through the sliding chutes. The rainwater in the cylinder flows into the water storage tank through the water outlet hole.

In this scheme, the curtain plate is fixed on the four-corner support with height difference and has a certain inclination angle. In rainy days, all the rainwater on the curtain plate is introduced into the rainwater collector through the rainwater collecting port, and then the rainwater is introduced into the water storage tank to complete rainwater collection.

Further, the rainfall assembly includes a steel pipe. The water inlet of the steel pipe is connected with the pumping assembly through a water pipe. The steel pipe is connected with a plurality of rainfall steel pipes. The rainfall steel pipes are uniformly and vertically distributed on the steel pipe. One end is welded and connected with the steel pipe, the other end is welded and connected with the baffle, and the welding position is located under the sliding chute. A plurality of sprinkler heads are arranged on the rainfall steel pipe.

In this scheme, the pumping assembly pumps water from the water storage tank to the steel pipe, and the steel pipe distributes water to the rainfall steel pipes, and sprinkles water through the sprinkler heads on the rainfall steel pipes to realize artificial rainfall simulation.

Further, the pumping assembly includes a base. The base is fixed on the solar stand. A second motor is fixed on the base. The output shaft of the second motor is rotationally connected with a water pump through a second coupling. The water inlet of the water pump is connected with the water storage tank. The water outlet of the water pump is connected with the water pipe.

In this scheme, the second motor drives the water pump to rotate, and the water pump converts mechanical energy into hydraulic energy of water, so that the water in the water storage tank enters the steel pipe.

Further, a bathysonde is fixed on the top of the water storage tank, and the bathysonde is electrically connected with the solar module.

In this scheme, the bathysonde can detect the water level height of the water storage tank, the water quantity of the water storage tank can be detected, the rainfall intensity of natural rainfall during rainwater collection can be obtained, and the signal can be transmitted to the remote signal end through the solar module to realize long-distance monitoring of water quantity and rainfall intensity.

Further, the solar module includes a solar panel. The solar panel is fixed on the top of the solar stand. An electrical box is fixed in the middle of the solar stand. A signal antenna is fixed on the electrical box. The signal antenna is in signal connection with the remote signal end. A storage battery and a controller are arranged in the electrical box. The controller is electrically connected with the solar panel, the signal antenna, the first motor, the second motor, the bathysonde and the humidity sensitive element, respectively.

In this scheme, the solar panel converts light energy into electrical energy and stores the electrical energy in the storage battery through the controller. The storage battery provides the electrical energy for the controller. The controller can collect the signals of the bathysonde and the humidity sensitive element, and can control the starting of the first motor and the second motor. The remote signal end can detect the signal in the controller in real time and transmit an instruction to the controller through the signal antenna.

In a second aspect, disclosed is an experimental method of the field integrated device for automatically shielding and collecting rainwater and simulating rainfall, including the following steps:S1, setting adjacent experimental ground and contrast ground with equal area, and placing the experimental ground below the roller shutter assembly;S2, setting the rotational speed and working time of the second motor, starting the second motor to drive the water pump to rotate, pumping the rainwater in the water storage tank to the rainfall assembly, and spraying the rainwater to the experimental ground below the roller shutter assembly by the sprinkler heads in the rainfall assembly to simulate artificial rainfall;S3, collecting a natural rainfall signal in real time by the humidity sensitive element, and if the humidity sensitive element does not detect the natural rainfall signal, executing step S7, and if the humidity sensitive element detects the natural rainfall signal, executing step S4;S4, transmitting the detected natural rainfall signal to the controller by the humidity sensitive element, starting the first motor of the driving assembly by the controller, driving the drum to rotate by the first motor, and driving the curtain plate to slide in the sliding chute by the drum until the free end of the curtain plate extends into the rainwater collector to shield natural rainwater;S5, enabling the natural rainwater to enter the rainwater collector along the curtain plate and fall into the water storage tank through the rainwater collecting pipe to collect the rainwater;S6, detecting the water level change of the water storage tank by the bathysonde, and calculating to obtain the natural rainfall intensity according to the water level change; andS7, turning off the second motor to end the experiment.

The field integrated device for automatically shielding and collecting rainwater and simulating rainfall has the following beneficial effects.

Firstly, the field integrated device can realize artificial rainfall simulation, and has the functions of automatically supplying power and keeping out and collecting rainwater. The field integrated device can be monitored and controlled in real time through the remote signal end, and is suitable for remote and unmanned places and wide in applicable scenes.

Secondly, the solar panel converts light energy into electrical energy and stores the electrical energy in the storage battery through the controller. The storage battery provides the electrical energy for the controller. The humidity sensitive element can detect the rainfall signal and transmit the signal into the controller. The controller controls the first motor to drive the curtain plate of the roller shutter to shield rainwater. The rainwater is guided into the rainwater collector while the rainwater is shielded by the curtain plate, and then the rainwater is guided into the water storage tank by the rainwater collector. The rainwater inside the water storage tank enters the rainfall assembly for rainfall under the driving of the pumping assembly. The remote signal end can detect the signal in the controller in real time and transmit an instruction to the controller through the signal antenna.

DETAILED DESCRIPTION OF THE EMBODIMENTS

Specific embodiments of the present disclosure are described below so as to facilitate the understanding of the present disclosure by those skilled in the art. However, it should be understood that the present disclosure is not limited to the scope of the specific embodiments and that all inventions utilizing the present ideas are protected to those skilled in the art as long as various variations are apparent within the spirit and scope of the present disclosure as defined and determined by the appended claims.

According to one embodiment of the present application, referring toFIG.1, the field integrated device for automatically shielding and collecting rainwater and simulating rainfall of the present scheme includes a roller shutter assembly1, a rainwater collecting assembly2, a rainwater collecting assembly3, a pumping assembly4, a solar module5and a signal end.

The roller shutter assembly1includes a mounting seat11, two baffles12and a four-corner support13. Referring toFIG.2, the mounting seat11is a hollow cuboid. The upper side of the cuboid is in threaded connection with the humidity sensitive element115. The side edge of the cuboid is welded and connected with the two baffles12, and the two baffles12are arranged oppositely. The two opposite ends of the four-corner support13have height difference. The high side of the four-corner support13is connected with the mounting seat11, and the low side of the four-corner support13is respectively connected with the two baffles12. The four-corner support13enables the baffles12to form a certain inclination angle with the ground, so that the rainwater is convenient to concentrate and flow into the rainwater collector31at low places.

The mounting seat11includes a first motor111, a first coupling112, a roller shutter and a humidity sensitive element115, and the roller shutter includes a drum113and a curtain plate114. The base46of the first motor111is fixed inside the cuboid through thread connection. The first motor111is electrically connected with the solar module5. The first motor111is rotationally connected with the drum113. Specifically, two bearing seats are oppositely arranged inside the mounting seat11. Bearings are installed in the two bearing seats. The outer ring of the bearing is in interference fit with the hole of the bearing seat. The drum113is internally provided with a rotating shaft in a penetrating manner. One end of the rotating shaft extends into one bearing and is in interference fit with the inner ring of the bearing, and the other end of the rotating shaft passes through the inner ring of the other bearing to be in clearance fit with the inner ring of the bearing and is connected with one end key of the first coupling112. The other end of the first coupling112is connected with the output shaft key of the first motor111. The first coupling112has the functions of buffering and shock and vibration absorption. The first motor111is connected with the rotating shaft of the drum113through the first coupling112, so that the drum113rotates smoothly.

The two baffles12are internally provided with sliding chutes121matched with the curtain plate114. The two sliding chutes121are arranged opposite to each other, and the sliding chute121extends into the rainwater collecting port311of the rainwater collector31. One side of the curtain plate114is fixedly connected with the drum113, and the other side of the curtain plate114is wound on the drum113. Both sides of the free end of the curtain plate114are provided with sliding blocks. The two sliding blocks are embedded in the sliding chute121and are in sliding connection with the sliding chute121, so that the friction force of the sliding block is small, and the curtain plate114is not easy to jam when moving in the sliding chute121. The curtain plate114in the embodiment is made of polyvinyl chloride (PVC) transparent material, so that the rainwater is shielded without affecting the illumination. In rainy days, the humidity sensitive element115detects a humidity signal and feeds the humidity signal back to the controller521of the solar module. The controller521compares the signal with a set threshold value. When the humidity signal is larger than the set threshold value, the controller521judges that it is raining. When the humidity signal is less than or equal to the set threshold, the controller521judges that it is sunny.

The embodiment does not limit the specific value of the threshold value, because the humidity values in different working environments and environments with different geographical conditions are not the same, that is, the threshold value can be set according to the local geographical position and environmental conditions, and the embodiment is not limited here.

When the controller521judges that it is raining, the controller controls forward rotation of the first motor111to drive the drum113to rotate, and the drum113drives the curtain plate114to be unfolded in the sliding chute121and enter the rainwater collecting port311, so that the rainwater falls into the rainwater collecting port311along the curtain plate114to complete rainwater collection. When the controller521judges that it is sunny, the controller521controls reverse rotation of the first motor111, and the first motor111drives the drum113to rotate and shrink the curtain plate114, so that the rain shielding function is turned off, and the automatic rain shielding function under the unmanned conditions is realized.

The rainwater collecting assembly3includes a rainwater collector31, a rainwater collecting pipe32and a water storage tank33. Referring toFIG.4, the rainwater collecting device31is a hollow cylinder with both ends welded on the two baffles12. A rainwater collecting port311is formed in the middle of the cylinder. Two sliding chutes121extend into the rainwater collecting port311. A water outlet hole312is formed in one end of the cylinder, and the water outlet hole312is connected with the water storage tank33through the rainwater collecting pipe32. The free end of the curtain plate114extends into the rainwater collecting port311through the sliding chute121. The rainwater on the sliding chute121falls into the cylinder. The rainwater in the cylinder flows into the water storage tank33through the water outlet hole312. The water storage tank33is fixed to a solar stand53. There is a certain amount of water in the water storage tank33before the experiment. A bathysonde331is fixed on the top of the water storage tank33, and the bathysonde331is electrically connected with the controller521. The bathysonde331of the embodiment, preferably an ultrasonic water level sensor, detects the water level change in the water storage tank in real time, and calculates to obtain the natural rainfall intensity according to the water level change.

The controller521sets the artificial rainfall simulation intensity by controlling the pumping device. When a rainfall assembly2is used for rainfall, the ultrasonic water level sensor detects the water level drop depth of the water storage tank33to monitor the rainfall amount of artificial simulated rainfall. The controller521judges whether the artificial simulated rainfall amount is consistent with the amount of water reduced by the water storage tank33, so that whether water is leaked or not is detected. When the water is leaked, the controller521transmits a signal to a remote signal end through a signal antenna522, and the experimenter can repair the water storage tank33in time after receiving the signal. In case of natural rainfall, the roller shutter shields the rain, and the rainwater is introduced into the water storage tank33. The ultrasonic water level sensor detects the water level rising height of the water storage tank33and feeds back the water level rising height to the controller521, so that the controller521obtains the natural rainfall intensity.

The rainfall assembly2includes a copper pipe, a rainfall copper pipe and a water pipe23. Referring toFIG.3, the water inlet of the copper pipe is connected with the water pipe23. The water pipe23is connected with the pumping assembly4. A steel pipe21is connected with a plurality of rainfall steel pipes22. A plurality of rainfall steel pipes22are uniformly and vertically distributed on the steel pipe21. One end of the rainfall steel pipe22is welded and connected with the steel pipe21. The steel pipe21and the rainfall steel pipe22are oppositely welded on both sides of the two baffles, and are all located below the sliding chute121. A plurality of sprinkler heads221are fixed on the rainfall steel pipes22. The sprinkler head221is connected with the rainfall steel pipe22. The pumping assembly4pumps water from the water storage tank33to the steel pipe21. The steel pipes21distribute water into the rainfall steel pipes22, and sprinkle water through the sprinkler heads221on the rainfall steel pipes22to realize artificial rainfall simulation.

The pumping assembly includes a second motor41, a second coupling42, a water pump43, a water inlet pipe44, a water outlet pipe45, a valve451and a base46. Referring toFIG.5, the base46is fixed to the solar stand53through bolted connection. The second motor41is in bolted connection with the base46. One end of the second coupling42is connected with the output shaft key of the second motor41, and the other end of the second coupling42is connected with the input shaft key of the water pump43. In this embodiment, the second coupling42preferably is a flexible coupling. The flexible coupling can compensate the deviation between the output shaft of the second motor41and the input shaft of the water pump43, and has the functions of buffering and shock and vibration absorption, so that it is ensured that the second motor41and the water pump43can work in the field for a long time.

The flexible coupling of this embodiment is externally provided with a protective cover. The protective cover is in bolted connection with the base46. The protective cover can prevent the flexible coupling from being invaded by dust such as fallen leaves in the field to affect rotation. The water inlet of the water pump43is connected with the bottom of the water storage tank33. It is ensured that the water in the water storage tank33can continuously enter the water pump43under the action of gravity. The water outlet of the water pump43is provided with a valve451. The valve451is connected with the water pipe23. The second motor41drives the water pump43to rotate. The water pump43converts mechanical energy into hydraulic energy of water, so that the water in the water storage tank33enters the steel pipe21. The controller521controls the rotational speed of the second motor41to control the flow rate of the water pump, so that the rainfall intensity can be adjusted.

The solar module5includes a solar panel51, an electrical box52and a solar stand53. The motor box includes a controller521, a signal antenna522and a storage battery523. The solar stand53includes a plurality of steel plates which are welded to form a hollowed-out cuboid. The top of the solar stand53is in bolted connection with the solar panel51. The water storage tank33and the electrical box52are fixed in the middle of the solar stand53. The pumping assembly4is fixed at the bottom of the solar stand53. The signal antenna522is fixed on the electrical box. The signal antenna522is in signal connection with the remote signal end. The signal end of this embodiment directly selects signal devices in the conventional technology, such as municipal construction monitoring terminals, computers and mobile equipments. The electric box is internally provided with the storage battery523and the controller521. The controller521is electrically connected with the solar panel51, the signal antenna522, the first motor111, the second motor41, the bathysonde331and the humidity sensitive element115, respectively.

The storage battery523of this embodiment is fully charged before the experiment, so that insufficient power in continuous rainy days is avoided. If the field experiment lasts for a long time, an additional standby battery or a solar panel51can be arranged to prolong the field working time. The solar panel51is provided with an illumination intensity sensor. The solar panel51converts light energy into electrical energy and stores the electrical energy in the storage battery523through the controller521. The storage battery523provides the electrical energy for the controller521. The controller521receives signals from the bathysonde331, the humidity sensitive element115and the illumination intensity sensor. The amount of water in the water storage tank33, the rainfall signal and the local light intensity can be detected. The rain shielding function of the roller shutter can be enabled by controlling the first motor111. The rainfall intensity of the rainfall assembly2can be controlled by controlling the rotational speed of the second motor41, and at the same time, the controller521monitors the electric quantity of the storage battery523.

The remote signal end detects the signal in the controller521in real time through the signal antenna522and transmits an instruction to the controller521to modify the rainfall simulation intensity, monitor the water quantity of the water storage tank, and collect the natural rainfall intensity and illumination intensity in the experimental area.

At the end of the experiment, the soil erosion amounts of the experimental ground6and the control ground are obtained through an existing soil erosion measuring device and a measuring method thereof. The soil erosion measuring device and the measuring method are the prior art and are not protected by the present disclosure, so the specific measuring process will not be described in detail. The obtained rainfall simulation intensity, the measured natural rainfall intensity and the local illumination intensity can be used for providing data support for the analysis of late soil erosion amount, but the present disclosure only provides data of rainfall intensity and illumination intensity related to the soil erosion amount, but does not protect the analysis process of the soil erosion amount.

The working principle of the embodiment is as follows.

In the aspect of automatic artificial rainfall simulation, the controller521controls the rotational speed of the second motor and controls the starting of the second motor41at regular intervals. The second motor41drives the water pump43to rotate. The water pump43converts mechanical energy into hydraulic energy, transports water from the water storage tank33into the copper pipe through the water pipe23. The water from the copper pipe flows into the rainfall copper pipe, and then is ejected through the sprinkler heads221in the rainfall copper pipe to simulate artificial rainfall. The controller521can control the rainfall simulation intensity by controlling the rotational speed of the second motor41.

In the aspects of automatic rain shielding and rain collection, when it rains, the humidity sensitive element115on the mounting seat11detects the signal and transmits the signal into the controller521. The controller521controls the first motor111to rotate, and drives the drum113to rotate, so that the curtain plate114slides into the rain collector31in the sliding chute121, so that rain shielding is realized. All the rainwater on the curtain plate114is guided into the rain collector31because the curtain plate114has an inclined angle, and the rain collector31guides the water into the water storage tank33, so that automatic rain shielding and rain collecting functions are realized.

In the aspect of acquiring rainfall intensity of natural rainfall, the bathysonde331in the water storage tank33detects the water depth of the water storage tank33in real time and feeds back the water depth to the controller521, and the controller521acquires the water output quantity through the water depth and the bottom area of the water storage tank33. When it rains, the water storage tank33acquires the water in the rainwater collector31, the bathysonde31detects the water level change, and the controller521acquires the rainfall intensity of natural rainfall through the water level change.

In the aspect of remote control, the remote signal end can receive the signal from the controller521through the signal antenna522connected with the controller521and can remotely transmit the instruction to the controller521.

According to one embodiment of the present application, disclosed is an experimental method of the field integrated device for automatically shielding and collecting rainwater and simulating rainfall, including the following steps:S1, setting adjacent experimental ground6and contrast ground with equal area, and placing the experimental ground6below the roller shutter assembly1;S2, setting the rotational speed and working time of the second motor41, starting the second motor41to drive the water pump43to rotate, pumping the rainwater in the water storage tank33to the rainfall assembly2, and spraying the rainwater to the experimental ground6below the roller shutter assembly1by the sprinkler heads221in the rainfall assembly2to simulate artificial rainfall;S3, collecting a natural rainfall signal in real time by the humidity sensitive element115, and if the humidity sensitive element115does not detect the natural rainfall signal, executing step S7, and if the humidity sensitive element115detects the natural rainfall signal, executing step S4;S4, transmitting the detected natural rainfall signal to the controller521by the humidity sensitive element115, starting the first motor111of the driving assembly1by the controller521, driving the drum113to rotate by the first motor11, and driving the curtain plate114to slide in the sliding chute121by the drum113until the free end of the curtain plate114extends into the rainwater collector31to shield natural rainwater;S5, enabling the natural rainwater to enter the rainwater collector31along the curtain plate114and fall into the water storage tank33through the rainwater collecting pipe32to collect the rainwater;S6, detecting the water level change of the water storage tank33by the bathysonde331, and calculating to obtain the natural rainfall intensity according to the water level change; andS7, turning off the second motor to end the experiment.

Specific embodiments of the present disclosure are the conditions described in detail below in combination with the attached figures, but should not be understood that the scope of the present disclosure is not limit by the specific embodiments. Within the scope described in the claims, various modifications and variations that can be made by those skilled in the art without creative work are still within the scope of protection of this patent.