3results about How to "Control duty cycle" patented technology

The invention discloses a gas sensor, and a temperature control system and method for the gas sensor, relates to the technical field of gas sensors, and aims to solve the problem that when the ambient temperature around the gas sensor is reduced, the change of the ambient temperature causes drifting of an output signal of the gas sensor, resulting in errors of a measurement result of the gas sensor. According to the gas sensor, a window is formed in a shell, and a window material used for allowing gas to penetrate through and blocking liquid or solid is arranged at the window. The shell is arranged on the base, and a containing cavity is formed between the shell and the base. The base pin penetrates through the base in the direction from the window to the base. The gas sensor chip is arranged on the first surface of the base; the gas sensor chip is electrically connected with the pins; the heating structure is arranged on the second surface of the base and is electrically connected with the pins; and the heating structure is used for heating the gas sensor chip and the base. The temperature measuring structure is arranged on the first surface of the base, is positioned in the accommodating cavity and is used for measuring the actual temperature around the gas sensor chip.

The invention relates to the technical field of memories, in particular to a CAM content addressing circuit and method based on memristor in-memory calculation, and aims at overcoming the defects of a traditional memory in the aspects of high-speed data retrieval and processing. According to the main scheme, the circuit comprises a PWM modulation unit, a multiplexer, a memristor array, a Ref voltage lookup table unit, an SA array and an encoder. A 4-bit digital signal is input through the PWM modulation unit, the multiplexer activates a specific storage row in the memristor array, and content addressing is carried out through conductance matching of the memristor array. Bit line voltage of the memristor array is output to the SA array and compared with reference voltage output by the Ref voltage lookup table unit, and matching signals are output through the SA array according to the comparison result, input to the encoder and decoded into address information. The method has the characteristics of high efficiency, simplicity and high integration level, meets the requirements of large-scale storage and calculation, and is widely applied to the fields of high-speed cache, network routers, database query and the like.

The application discloses a control method and device of an automobile engine management system and electronic equipment. The automobile engine management system comprises a main control unit, a secondary control unit, a carbon tank, a carbon tank electromagnetic valve, a first cylinder and a second cylinder. The control method comprises the following steps: the main control unit determines that the absolute value of the difference between the air-fuel ratio of the first cylinder and the expected air-fuel ratio is a first difference value; the main control unit determines that the absolute value of the difference between the air-fuel ratio of the second cylinder and the expected air-fuel ratio is a second difference value; and the main control unit controls the duty cycle of the carbon tank electromagnetic valve according to the size relationship between the first difference value and the second difference value, and preferentially meets the demand of the cylinder corresponding to the larger difference value for the fresh air containing gasoline vapor. The technical solution provided by the embodiment of the application solves the problem that the demand of the two cylinders for the fresh air containing gasoline vapor cannot be met by controlling the duty cycle of the carbon tank electromagnetic valve by using one control unit.