Please select the most similar patent number from A, B, C and D. Which number is?
A multipurpose smart cap for outdoor sports, comprising rotating shafts (1), earphones (2), a temperature/humidity sensor (3), a sandwich (4), an ultrasonic distance detector (5), solar panels (6), a gas detection probe (7), a cap body (8), a miniature camera (9), a switch (10), a buckle (11), a touch screen (12), a band (13), a photoelectric sensor (14), a GPS chip (15), a storage chip (16), a wireless transceiver device (17), and a microprocessor (18). The multipurpose smart cap is provided with the temperature/humidity sensor (3) and the gas detection probe (7) which can directly measure the temperature/humidity and the gas content of a sports environment; the earphones (2) perform voice broadcast to prompt whether the current sport environment is suitable for sports; the provided ultrasonic distance detector (5) can detect a distance from an obstacle in front, and effectively provide a prompt in time; the provided miniature camera (9) can record a video in the whole process, thereby resolving the trouble caused by the need of carrying an entertainment device during running, such as a mobile phone. The provided cap body having the photoelectric sensor (14) can keep out wind and rain for persons playing sports while tracking their sports data.
A: Disclosed in the present invention is a multifunctional speaker hat for intelligent interaction, comprising an easy-to-wear hat body and a visor provided at the front end of the hat body. Speakers are symmetrically arranged on the visor; a central controller for controlling and connecting the speakers is provided on one side of the hat body; the central controller is wirelessly connected to the speakers; a motion navigation member is provided at the top of the hat body; the motion navigation member comprises a gyroscope sensor and a GPS positioner; the central controller is wirelessly connected to the gyroscope sensor and the GPS positioner; a detection ring assembly for physical health monitoring is further provided on the inner side surface of the hat body and close to the visor; the central controller is electrically connected to the detection ring assembly; and the central controller is also internally provided with an MCU central chip for data operation processing. According to the present invention, the hat has a speech interaction function, a smart speaker function, a health data monitoring and early-warning function, a wireless data cloud storage function, and a real-time positioning and navigation function, so that the intelligence and functionalization of the hat are improved, and thus the market competitiveness is improved.
B: A real-time water quality monitoring system, comprising a microprocessor (1), a camera (11), a water level sensor (12), a water quality sensor (13), a GPS transmitting module (14), and a wireless transceiver module (15). The camera (11), the water level sensor (12), the water quality sensor (13), the GPS transmitting module (14), and the wireless transceiver module (15) are all electrically connected to the microprocessor (1). The water quality sensor (13) comprises a temperature sensor (16), a PH sensor (17), a granulometer (18), and an ammonia-nitrogen analyzer (19). Multi-parameter testing equipment is used to carry out comprehensive testing of a water quality environment, and test results can be transmitted remotely, eliminating the need for on-site inspection. In addition, water resources and water surfaces can be observed in real time via the camera (11).
C: A smart cup holder, comprising a cup holder body (1). The cup holder body (1) is a frusta-conical body with a large upper diameter and a small lower diameter; a pressure sensor (11) and a temperature and humidity sensor (12) are provided at the bottom of the cup holder body (1); a non-slip layer (13) is provided on the inner side wall of the cup holder body (1); a notch (14) is provided on the side wall of the cup holder body (1); a handle sleeve (15) for wrapping a handle is provided on the outer side wall of the cup holder body (1); a touch sensor (151), a processor, and a power module are provided on the handle sleeve (15); the pressure sensor (11), the temperature and humidity sensor (12), and the touch sensor (151) are separately connected with the processor; the pressure sensor (11), the temperature and humidity sensor (12), the touch sensor (151), and the processor are separately connected with the power module. By detecting relevant data by means of the pressure sensor (11) and the temperature and humidity sensor (12), and feeding the detected relevant data back to the processor for comprehensive analysis, the present invention can calculate the amount of water a user drinks and can also prompt the user to drink water. Moreover, the smart cup holder can prevent water from entering to influence the electrical performance.
D: A smart monitoring system for fruits and vegetables on the basis of the Internet of things comprises an air blower (1), a smart socket (2), a heater (3), an illumination tube (4), a web camera (5), a solar cell panel (6), a storage battery (7), a microprocessor (8), a sliding door (9), a wireless radio frequency transceiver device (10), a temperature and humidity sensor (111), an illumination sensor (112), a seeding unit (12), a moisture sensor (13), a sprinkling device (14), a plate shed (15), a film reeler (16), a fly net (17), a motor (18), and a water pipe (19). A power supply manner combining the solar cell panel with the storage battery is used in the system, and the system has the advantages of low energy consumption and low cost; a master control machine room or a mobile device can be wirelessly connected to the wireless radio frequency transceiver device (10) to carry out accurate control and commissioning; two device control manners, which are an automatic control manner and a manual control manner, are used to monitor a production environment of fruit and vegetable comprising temperature, moisture and illumination, the control of fruit and vegetable production on the basis of a wireless sensor network technology is implemented, and the latticed fly net can effectively prevent mosquitoes from entering.
Answer: A