Voice recognition circuit of intelligent nursing bed

The utility model discloses a voice recognition circuit of an intelligent nursing bed, which comprises a 220V AC (alternating current) power supply module, a 24V isolation power supply protection circuit, a 3.3 V power supply circuit, an MCU (microprogrammed control unit) main control circuit, a voice control circuit, a power amplifier circuit, a microphone and a loudspeaker, and the output end of the 220V AC power supply module is connected with the input end of the 24V isolation power supply protection circuit. The output end of the 24V isolation power supply protection circuit is connected with the input end of the 3.3 V power supply circuit, and the output end of the 3.3 V power supply circuit is connected with the input end of the MCU main control circuit and the input end of the voice control circuit. According to the voice recognition circuit of the intelligent nursing bed, intelligent control in a network-free state is realized, so that a patient or a medical worker can control the nursing bed to perf