Receiving end of voice collection device for smart home centralized control system

Abstract

The invention discloses a receiving end of a voice collection device for a smart home centralized control system, aims at providing a voice signal front-end receiving device, so as to meet the demands of wireless voice signal collection in a smart home system. The receiving end comprises a signal input loop which is used for receiving a wireless electric signal and comprises a resonance circuit composed of a coil T1 and a fine tuning capacitor CA, wherein the coil T1 comprises a primary winding and a secondary winding, and two ends of the primary winding are connected with the fine tuning capacitor CA; a frequency mixing circuit which enables a received wireless electric signal to be converted into an intermediate-frequency signal and comprises a triode VT1, wherein a local oscillation signal of an emitter electrode of the triode VT1 can achieve the modulation with signals inputted by the resonance circuit composed of the coil T1 and the fine tuning capacitor CA, and an intermediate-frequency signal is generated at a collector electrode; an intermediate frequency amplification circuit which enables the amplitude of an intermediate frequency amplitude modulation signal to be amplified to the value required by a detection circuit; the detection circuit which enables an audio signal carried by the intermediate frequency amplitude modulation signal to be extracted and transmitted to a low-frequency pre-amplifier; and the low-frequency pre-amplifier which carries out the voltage amplification of the detected audio signal.

Description

technical field [0001] The invention belongs to the technical field of smart home systems, and provides a receiving end of a voice collection device of a smart home central control system. Background technique [0002] With the introduction of the concept of "Internet +" in China, "Internet +" has set off an upsurge in various fields in the country for a while, and today, when people's material and cultural living standards have been greatly improved compared with the past, people have put forward a new level of intelligence in the living environment. People can no longer satisfy the traditional manual control of the living environment, but put forward new requirements for the intelligence of the living environment, so that smart homes have been developed under the concept of "Internet +", "Internet +" It represents a new social form, which is to give full play to the optimization and integration of the Internet in the allocation of social resources, deeply integrate the inn...

AI Technical Summary

Problems solved by technology

With the rapid development of speech recognition technology, the accuracy rate of existing speech recognition technology has reached more than 95%. Therefore, speech recognition technology has been widely used in command recognition in smart home systems. The picking up of voice control commands is very important. When the voice signal is picked up, the commands issued by other speaker electronic devices will be misjudged by the smart home system, and if the user goes out, the voice commands issued by the TV may also be detected. Smart home system identification implementation

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