Please select the most similar patent number from A, B, C and D. Which number is?
Disclosed are a jellyfish-type underwater detector and a detection method therefor. The underwater detector comprises a detection robot and a remote terminal. The detection robot comprises a housing (1), a bionic muscle, an elevator (9), a driving unit, a steering control unit (3), and a plurality of visual sensing units (2); and the remote terminal comprises a signal processing unit mounted in the housing (1) in a sealed manner, and a virtual reality headset in remote connection with the signal processing unit. The underwater detector moves agilely underwater and is highly reliable.
A: An ultrasound underwater detection method for an unmanned aerial vehicle co-driven by air rotors (1 and 2) and a propeller (8). The ultrasound underwater detection method for the unmanned aerial vehicle co-driven by the air rotors (1 and 2) and the propeller (8) moves and balances the unmanned aerial vehicle by controlling the air rotors (1 and 2) above the unmanned aerial vehicle and the underwater propeller (8) below the stern, and comprises the following steps: receiving a control command to obtain the position of a detection fixed point; flying to the detection fixed point; using a posture instrument (12) to measure and record the posture of the unmanned aerial vehicle and compiling statistics on the direction of wave motion; controlling the unmanned aerial vehicle to orient perpendicular to the direction of wave motion; controlling the unmanned aerial vehicle to cruise around the detection fixed point; controlling an ultrasond microarray (10) to collect a parameter of an area of water, maintaining the posture of the unmanned aerial vehicle; if scan detection is required, changing the roll angle and the yaw angle of the unmanned aerial vehicle to perform detection; if the detection of the area of water at the fixed point is completed, then receiving a control command and flying to the next detection fixed point; and if not, then continuing flight and detection. The underwater detection method for the unmanned aerial vehicle co-driven by the air rotors (1 and 2) and the propeller (8) increases the detection speed and detection precision of the unmanned aerial vehicle.
B: An underwater robot having a sonar detection device, comprising a robot body (1). A hollow container (2) is provided on each side of the robot body (1), connecting rods (7) are provided on a lower end of the robot body (1), hollow columns (3) are provided on the other end of the connecting rods (7), a camera (5) is provided on a front end of the robot body (1), a transparent protection cover (4) is provided outside the camera (5), a first sonar detector (6) is provided below the front end of the robot body (1), and a second sonar detector (8) is provided behind the first sonar detector (6). The first sonar detector (6) and the second sonar detector (8) can be configured to detect shoals of fish and obstacles in deep water, improving the accuracy and efficiency of working, and a winding-up device is provided to quickly retract the underwater robot, reducing the labor intensity of people, and improving the overall degree of automation; the underwater robot has a simple structure, is easy to operate, and has good functionality, greatly reducing the labor intensity of people, and providing strong practicability.
C: An underground mineral product detector provided with a video capture unit comprises a cylindrical detector body (1). A circuit layer (2) and a power supply layer (3) are disposed in the detector body (1). The underground mineral product detector also comprises a detection circuit disposed in the circuit layer (2). The detection circuit comprises: a central processing unit; a Hall sensor (6), a radioisotope detector (7) and an ultrasonic sensor (8) that are in signal connection with the central processing unit; and a communication apparatus that is in signal connection with the central processing unit. The communication apparatus is used for wirelessly transmitting out detected information. A power supply module is disposed in the power supply layer (3), and supplies power to a detection circuit. A wired lug (4) is disposed on the top of the detector body (1). By means of a proper structure design and multi-probe detection, a function of conveniently detecting mineral product resources is implemented; the detector is simple and convenient and provides a portable device for underground detection.
D: An LED fish-luring system with a visible light communication function. The system comprises an onboard LED fish-luring lamp, an underwater LED fish-luring lamp and an illumination control apparatus. The system further comprises an optical signal transmitter and an optical signal receiver. Signal transmitting and receiving are controlled by an LED visible light communication centre control apparatus. The optical signal transmitter comprises an information transmitting processing unit, a signal modulation circuit, an LED driving unit and the onboard LED fish-luring lamp. The optical signal receiver comprises a photoelectric detector, a signal demodulation circuit and an information receiving processing unit, and the information receiving processing unit of the optical signal receiver communicates with an information terminal. In the present invention, the brightness, the colour temperature, the chromaticity, a flicker frequency and a duty ratio of an LED fish-luring lamp are adjusted; the angle of an board LED fish-luring lamp is adjustable, and lifting adjustment may further be performed by means of a lifting apparatus; and the onboard LED fish-luring lamp has a visible light communication function, and an intra-ship communication local area network is formed and performs interconnection and intercommunication with a land command centre and other ships, so that the quantity of communication devices and communication costs can be reduced and a combination of illumination and communication can be implemented.
Answer: B