Please select the most similar patent number from A, B, C and D. Which number is?
A smart cup, comprising a cavity (1) for containing water. A pressure sensor (11), a processor (14) and a power module (15) are provided at the bottom of the cavity (1); a water level sensor (12) and a water quality detection device (13) are provided on the inner side wall of the cavity (1); the pressure sensor (11), the water level sensor (12), the water quality detection device (13) and the processor (14) are separately connected to the power module (15); the pressure sensor (11), the water level sensor (12) and the water quality detection device (13) are separately connected to the processor (14). The water quality detection device (13) is provided on the inner side wall of the cavity (1) of the smart cup and used for detecting the oxygen content of water in the cavity (1) so as to accurately detect the water quality; the pressure sensor (11) at the bottom of the cavity (1) of the smart cup and the water level sensor (12) on the inner side wall of the cavity (1) acquire related data and send the data to the processor (14) to cooperatively calculate the amount of water a user drinks. The smart cup has high intelligence.
A: A smart geological monitoring base station, comprising a base (1), a monitoring box (2) being provided on the base, and a battery cavity (5), a circuit cavity (4) and a communications cavity (3) being provided in the monitoring box (2); a monitoring circuit is provided in the circuit cavity (4), the monitoring circuit comprising a main controller, and a wind speed sensor (7), a water level sensor (9) and a communications device, each having a signal connection to the main controller; the wind speed sensor (7) is provided on top of the monitoring box (2), and the water level sensor (9) is provided on the base (1); a rechargeable battery is provided in the battery cavity (5), the rechargeable battery being used to supply power to the monitoring circuit; the communications device comprises an antenna, the antenna being provided in the communications cavity (3); smart monitoring can be realized by connecting to a communications system, making monitoring convenient, simple and effective, and decreasing losses from natural disasters.
B: A smart seat (51) capable of monitoring weight, temperature and water quality, and a base structure facilitating barreled water taking and placing. The smart seat (51) comprises a smart seat body (10), a water quality sensor (40), a pressure sensor (30), a temperature sensor, double water ports and a main control board (20); the pressure sensor (30) is provided at the bottom of the smart seat body (10) for sensing the weight of the smart seat body (10) and the liquid inside, and transmitting same to the main control board (20); the water quality sensor (40) and the temperature sensor are provided at positions below the liquid level inside the smart seat body (10) for sensing the water quality state and temperature, and transmitting same to the main control board (20); and the main control board (20) processes the sensed weight information and water quality information. The base structure comprises: a foundation (60) and a base (50) sliding relative to the foundation (60), the base (50) has a top side on which the smart seat (51) is provided, and an edge side or a bottom side on which a base sliding member (53) is provided, a foundation sliding member (61) is provided on the foundation (60) at a position corresponding to the base sliding member (53), and the foundation sliding member (61) and the base sliding member (53) slide in a fitted manner.
C: A smart cup, comprising a cup body (110), a cup cover (120), a light sensor (130) and a main board (140), wherein the cup cover (120) is arranged on the cup body (110), the light sensor (130) is arranged on the cup body (110) and is covered by the cup cover (120), the light sensor (130) can be exposed by opening the cup cover (120), the main board (140) is arranged at the bottom part of the cup body (110) and is isolated from an inner cavity of the cup body (110), the main board (140) is provided with a main processor (141) and a gravitational accelerometer (142), and the light sensor (130) and the gravitational accelerometer (142) are both connected to the main processor (141). The smart cup can measure a drinking amount in real time and has no need to wait until the smart cup is in a static steady state, and a measuring element is not in contact with drinking water, so the measurement is safe and sanitary.
D: A water quality monitoring device based on a microbial fuel cell, relating to the technical field of water quality monitoring. A storage battery module is provided in a main machine body (4) to provide power. The main machine body (4) can move in a water environment to detect the water quality of different areas in the water environment. An integrated sensor module (3) and a microbial fuel cell module are provided on the main machine body (4). The integrated sensor module (3) collects a pH value in the water environment. The microbial fuel cell module continuously and stably charges the storage battery module by means of sliding mode control, and collects data of current that is generated in the water environment and changes with time, wherein the data of the current changing with time is used for determining a heavy metal pollution status of the water environment. The water quality monitoring device combines a microbial fuel cell with a water quality monitoring system, improves the quality of water resources, and can also provide stable power supply for a long time to realize long-term real-time monitoring of water quality. The device has large technology and market development space, and has remarkable social benefits, economic benefits and environmental benefits.
Answer: C