Please select the most similar patent number from A, B, C and D. Which number is?
A highway comprehensive meteorological detection device and a detection method therefor. The device comprises: a plurality of meteorological test units arranged on a highway, a remote computer and a cloud server, wherein a meteorological test unit is used for transmitting and calculating meteorological test data; the remote computer is used for sending a test instruction to the meteorological test units at the head and tail ends; and the cloud server is used for receiving the test data of the whole test link formed by the plurality of meteorological test units, and analyzing and calculating to obtain a final meteorological result. According to the device and method, the comprehensive meteorological condition along the highway can be quickly, comprehensively and accurately known, the quantitative test of meteorological weather such as rainfall, snowfall, fog or haze is realized, solving the defect that existing image identification software has difficulty in realizing quantitative identification. Data or commands can be transmitted to the other end of the link from one end of the link, only the wireless modem needs to be configured at the endpoint unit to be connected to the Internet of Things, test data uploading, test maintenance and other commands are issued, and the cost is relatively low.
A: A meteorological information acquisition method based on a set-top box (20), and a system therefor. The meteorological information acquisition method based on the set-top box (20) comprises: a meteorological acquisition apparatus (10) acquiring meteorological data and transmitting same to the set-top box (20) (S100); the set-top box (20) packaging the meteorological data and then sending same to a meteorological observatory via a transmission channel (S200); and the set-top box (20) receiving weather prediction information fed back by the meteorological observatory, analysing same and then transmitting same to a television set (S300). According to the meteorological information acquisition method based on the set-top box (20) and the system therefor, the universality of users of the set-top box (20) is utilized, and meteorological data is obtained by means of the set-top box (20) and is uploaded to a meteorological observatory, thereby greatly enriching the number of samples of meteorological data, and providing a more accurate and precise data basis for weather prediction.
B: A testing system and method for a thermoelectric module. The testing system comprises an electrical property testing unit (1), a thermal flux detecting unit and processor (3); the electrical property testing unit (1) is electrically connected with a thermoelectric module (2) operating in a power generation state, in order to test the output power P of the thermoelectric module (2) and the current I and internal resistance R of the thermoelectric module (2) operating under this output power; the thermal flux detecting unit comprises a heat flux sensor (5) arranged at a cold end of the thermoelectric module (2) and used for detecting the heat flux Qc1 of the cold end of the thermoelectric module (2); the processor (3) is electrically connected with the electrical property testing unit (1) to receive the information detected by the electrical property testing unit (1); the processor (3) is electrically connected with the heat flux detecting unit to receive the heat flux Qc1 of the cold end of the thermoelectric module (2) detected by the heat flux detecting unit, and the processor (3) is used for calculating the thermoelectric conversion efficiency of the thermoelectric module (2) according to the formula η=P/(Qc1+P-1/2I2R). By applying the testing system and the testing method, detection of the thermoelectric conversion efficiency of the thermoelectric module is realized.
C: Disclosed is a biochemical analyzer and tester （1a）, comprising a main control unit (50a) and at least two mutually independent test units (100a). The main control unit (50a) respectively interconnects with the general power control switch, data output/input control system and test unit (100a), and each test unit (100a) comprises at least a sample delivery device (110a) and a light source device (111a). An analysis and test method using the analyzer and tester is also disclosed. The tester and test method can improve the test speed per unit time and provide an accurate test result, and the tester and test method can be used in detecting a series of physiological and biochemical indexes such as glucose, cholesterol, high density fatty acids, low density fatty acids, triglycerides, uric acid, bilirubin, total protein, haemoglobin and ketone bodies, etc.
D: An electromagnetic compatibility test system and method for on-screen-display data. The electromagnetic compatibility test system for on-screen-display data comprises a test unit (0011), a data obtaining unit (0012), a shooting monitoring unit (0013), and an on-screen-display control unit (0014). The data obtaining unit (0012) is used for obtaining first test data generated by the test unit (0011), extracting the target data in the first test data to generate second test data, and sending the second test data to the on-screen-display control unit (0014). The shooting monitoring unit (0013) is used for performing video monitoring on a region to be tested, and sending obtained video data to the on-screen-display control unit (0014). The on-screen-display control unit (0014) is used for displaying received second test data and video data on a same screen. The test system can implement simultaneous display of test data and monitoring videos, and can provide great convenience for test personnel.
Answer: A