CN216332683U - Light-driven bionic octopus soft underwater robot - Google Patents

Abstract

The utility model provides an optically-driven bionic octopus soft underwater robot which comprises a power system and a control system, wherein the power system comprises a bionic wrist foot, the bionic wrist foot comprises at least three wrist foot units which are sequentially connected, each wrist foot unit comprises a cylindrical silicon elastomer, at least three power tubes are arranged in each wrist foot unit, and the power tubes are cylindrical cavities made of optically-responsive materials. The utility model can realize bending and deformation in any direction or angle, and has high flexibility and large operation space.

Description

Light-driven bionic octopus soft underwater robot

Technical Field

The utility model relates to the technical field of design and manufacture of marine equipment, in particular to an optically-driven bionic octopus soft underwater robot.

Background

Currently, an underwater robot can be manufactured using a photo-thermal Liquid Crystal Gel (LCG). Liquid crystal polymers (LCE), liquid crystal elastomers (LCN) and the like are subjected to swelling treatment by liquid crystal small molecules (LC) to synthesize a novel photo-thermal material LCG which is more sensitive to light stimulation, and light energy can be converted into heat when the material is irradiated by light, so that the temperature of the material is slightly changed, and phase change is further excited to enable the material to be bent and deformed; making LCG into strips and placing the strips in water; the bionic sea cucumber is irradiated by ultraviolet light or laser at a specific chopping frequency, so that various underwater motion modes such as crawling, walking, jumping or swimming which are shared by invertebrates can be realized. However, the current optical drive system is too simple, basically has no capability of executing tasks, and has a great distance from practical application.

Therefore, there is a need in the prior art for an underwater robot that has the characteristics of large deformation degree and high flexibility and can freely shuttle in a narrow space.

SUMMERY OF THE UTILITY MODEL

Aiming at the defects of the prior art, the utility model provides an optically-driven bionic soft octopus underwater robot.

In order to achieve the purpose, the utility model is realized by the following technical scheme:

a light-driven bionic octopus soft underwater robot comprises a power system and a control system, wherein the power system comprises a bionic wrist foot, the bionic wrist foot comprises at least three wrist foot units which are sequentially connected, each wrist foot unit comprises a cylindrical silicon elastomer, at least three power tubes are arranged in each wrist foot unit, each power tube is a cylindrical cavity made of a photoresponse material, a shading flexible film is arranged in each power tube along the axial direction, unsaturated mercury vapor is filled in each power tube, a temperature sensor is further arranged on each power tube, and electrode groups are arranged at two ends of each wrist foot unit; the control system comprises an upper computer, a lower computer, a PWM pulse output system and a remote controller, wherein the upper computer is in signal connection with the lower computer, the lower computer is in signal connection with the temperature sensor, the lower computer is in signal connection with the PWM pulse output system, and the remote controller is in signal connection with the upper computer.

The photoresponse material is liquid crystal gel LCG-70 with photo-thermal characteristics.

The remote controller is connected with the upper computer through an acoustic signal, and the remote controller is arranged on the water surface.

The shading flexible film is arranged along the axial direction of the power tube.

The shading flexible film is a rubber film.

The temperature sensor is a DS18B20 sensor.

The number of the power tubes is three.

The number of the wrist-foot units is four.

Compared with the prior art, the utility model has the beneficial effects that:

1. the robot is made of flexible materials, so that the robot has infinite freedom degrees in a certain range, can realize bending and deformation in any direction or angle, has high flexibility and large operation space, and has wider application range than a rigid robot;

2. the power adopts the light driving technology based on the photoresponse material, and the robot can be operated only by little light, thereby obviously reducing the energy consumption level. This in turn means longer underwater working times and greater endurance;

3. illumination is used as driving, and a complicated power supply, induction and braking system is omitted, so that the mechanism is greatly simplified. In addition, the density of the flexible material is far lower than that of a metal material commonly used by a rigid robot, and the body is lighter, so that the robot has stronger maneuverability;

4. the bionic wrist foot adopts a design mode of combining a plurality of repeated units, and each unit is mutually independent in work. The design realizes various combinations of different unit actions, thereby realizing very complex actions.

Drawings

Fig. 1 is a schematic structural view of a wrist-foot unit.

Fig. 2 is a structural schematic diagram of the bionic wrist foot.

FIG. 3 is a schematic diagram of a power tube configuration.

FIG. 4 is a schematic diagram of a control path of the control system.

Fig. 5 is a schematic diagram of the communication links of the control system.

Fig. 6 is a logic block diagram of a control system.

Detailed Description

The utility model is further illustrated by the following specific embodiments.

The light-driven bionic octopus soft underwater robot comprises a power system and a control system, wherein the power system comprises a bionic wrist foot, the bionic wrist foot comprises at least three sequentially connected wrist foot units, each wrist foot unit comprises a cylindrical silicon elastomer 1, at least three power tubes 3 are arranged in each wrist foot unit, in the embodiment, three power tubes 3 are arranged in each wrist foot unit, the positions, implanted into the wrist foot units, of the three power tubes 3 and the connecting line of the circle centers of the cross sections of the wrist foot units form 120 degrees, and the number of the wrist foot units is four. The power tube 3 is a cylindrical cavity made of the photoresponsive material 2, and in the embodiment, the photoresponsive material 2 is liquid crystal gel LCG-70 with photothermal characteristics.

The power tube 3 is filled with unsaturated mercury vapor 4, and the power tube 3 is also provided with a temperature sensor, in this embodiment, the temperature sensor is a DS18B20 sensor. The control system comprises an upper computer, a lower computer, a PWM pulse output system and a remote controller, wherein the upper computer is in signal connection with the lower computer, the lower computer is in signal connection with the temperature sensor, the lower computer is connected with the PWM pulse output system and controls the PWM pulse output system, and the remote controller is in signal connection with the upper computer. The upper computer is a micro PC, and the lower computer is a stm32 singlechip.

The power tube 3 is provided with shading flexible membrane 6 along the axial in the inside, and shading flexible membrane 6 is the rubber membrane to along the axial setting of power tube 3, separate into two parts with power tube 3 along the axial, the rubber membrane is light-tight, can play the effect of shading. The completely hollow power tube 3 can not drive the wrist and foot to bend, because the photoresponsive material 2 opposite to the two sides of the diameter can be bent in the opposite directions in equal amount when receiving equal doses of ultraviolet light at the same time, and the displacement is zero after the vector synthesis of the two materials. Therefore, the interior of the power tube 3 is separated by the light-shielding flexible film 6, two sides of the light-shielding flexible film 6 are respectively provided with a pair of electrodes which are arranged at two ends of the power tube 3 and can generate an electric field along the extension direction of the power tube 3 in the tube, the electrode groups 5 at two sides of the light-shielding flexible film 6 are respectively an independent electrode group A7 and an independent electrode group B8, namely, the positive electrode of the independent electrode group A7 and the positive electrode of the independent electrode group B8 are respectively positioned at two sides of the light-shielding flexible film 6 and at the same end of the power tube 3 but are not connected, the negative electrodes of the independent electrode group A7 and the negative electrodes of the independent electrode group B8 are respectively positioned at two sides of the light-shielding flexible film 6 and at the same end of the power tube 3 but are not connected, and the two groups of electrodes are mutually independent in operation. When one side of the shading flexible film 6 emits light, the shading flexible film 6 is pressed to the opposite side and attached to the surface of the opposite side light response material 2 by additional pressure generated by the unsaturated mercury vapor 4, so that the photosensitive response of the opposite side material is blocked, and the power tube 3 only has one side to be photosensitive, so that the contradiction on power is solved.

As shown in fig. 4, the upper computer and the lower computer establish communication, and the lower computer controls the PWM pulse output system to output a specific pulse voltage by using a PID algorithm, so as to form a specific stroboscopic light source and excite a specific motion of a material. The PWM pulse output system outputs pulse voltage to generate an ultraviolet light source. Under the irradiation of ultraviolet light, the power tube 3 can be subjected to photosensitive bending, so that the wrist-foot unit is driven to bend; the tiny change of the material temperature caused by illumination is transmitted to the lower computer as feedback information by the temperature sensor, thereby realizing automatic adjustment. The bending degree and the bending-resetting frequency of the power tube 3 can be controlled by controlling the magnitude and the frequency of the applied voltage. The three power tubes 3 work independently, the bending direction of each tube can realize the bending deformation of the wrist-foot unit in any direction through vector synthesis, and the combination of the bending deformation of each wrist-foot unit can realize the specific action of the whole bionic wrist-foot. The three tubes simulate the longitudinal muscles of the wrists and the feet of the octopus, play a bending function, complete the work of grabbing, swimming and the like, and well simulate the neural network of the octopus by grading and feedback.

The remote controller is arranged on the water surface and is connected with the upper computer through an acoustic signal, and the remote controller is communicated with the upper computer through the acoustic signal because the electromagnetic signal is quickly attenuated in the water. As shown in fig. 5, the underwater information collector collects information of the surrounding environment and sends the information to the water surface ship-borne remote controller in the form of ultrasonic signals, the remote controller makes instructions after studying and judging, and feeds the instructions back to the underwater robot, and the underwater robot performs corresponding actions. Specifically, as shown in fig. 6, the made instruction is used by the upper computer to call the action library, and corresponding voltage frequencies are output to different wrists and feet, different wrists and feet units, different power tubes 3, and two sides of the shading flexible film 6 of the same power tube 3, and voltage frequency signals are converted into stroboscopic light sources to excite material deformation, so that the stroboscopic light sources are converted into acting forces output by the power tube 3, and further specific deformation of the wrists and feet units is triggered. The deformation of different wrist-foot units can be subjected to vector synthesis to output the specified action.

The above is only a preferred embodiment of the present invention, but the present invention is not limited to the above-mentioned specific embodiments, and those skilled in the art can make several variations and modifications without departing from the inventive concept of the present invention, which fall into the protection scope of the present invention.

Claims (7)

1. An optically-driven bionic octopus soft underwater robot is characterized by comprising a power system and a control system, wherein the power system comprises a bionic wrist foot, the bionic wrist foot comprises at least three wrist foot units which are sequentially connected, each wrist foot unit comprises a cylindrical silicon elastomer, at least three power tubes are arranged in each wrist foot unit, each power tube is a cylindrical cavity made of an optically-responsive material, a shading flexible film is arranged in each power tube along the axial direction, unsaturated mercury vapor is filled in each power tube, a temperature sensor is further arranged on each power tube, and electrode groups are arranged at two ends of each wrist foot unit; the control system comprises an upper computer, a lower computer, a PWM pulse output system and a remote controller, wherein the upper computer is in signal connection with the lower computer, the lower computer is in signal connection with the temperature sensor, the lower computer is in signal connection with the PWM pulse output system, and the remote controller is in signal connection with the upper computer.

2. The light-driven soft bionic octopus underwater robot as claimed in claim 1, wherein the light-responsive material is liquid crystal gel LCG-70 with photothermal properties.

3. The light-driven bionic octopus soft underwater robot as claimed in claim 1, wherein the remote controller is connected with the upper computer through an acoustic signal, and the remote controller is arranged on the water surface.

4. The light-driven soft bionic octopus underwater robot as claimed in claim 1, wherein the light-shielding flexible film is a rubber film.

5. The light-driven soft bionic octopus underwater robot as claimed in claim 1, wherein the temperature sensor is a DS18B20 sensor.

6. The light-driven soft bionic octopus underwater robot as claimed in claim 1, wherein the number of the power tubes is three.

7. The light-driven soft bionic octopus underwater robot as claimed in claim 1, wherein the number of the wrist-foot units is four.

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