800-MHz (megahertz) digital wireless baby monitor

Abstract

The invention discloses an 800-MHz digital wireless baby monitor. The 800-MHz digital wireless baby monitor comprises a transmitter and a receiver, wherein the transmitter comprises a transmitter housing and a PCB (Printed Circuit Board) printed circuit board assembly arranged in the transmitter housing, the receiver comprises a receiving housing and the PCB printed circuit board assembly arranged in the receiving housing, and the PCB printed circuit board assembly comprises a radio frequency amplifying circuit, a DSP (Digital Signal Processor) digital signal processor, an audio frequency amplifying circuit, a temperature detection circuit and a smoke warning detection circuit. According to the 800-MHz digital wireless baby monitor, an 800-MHz frequency range is adopted, and a frequency hopping spread spectrum technique and a half-duplex working manner are used, so that the anti-jamming capability is strong; as a DSP digital filter is adopted, the tone quality is clear, and a reliable communication distance in an empty region can reach up to 600 meters; and the design is simple, the material cost and the production cost are lowered, and the output is improved.

Description

technical field [0001] The invention relates to the technical field of wireless home safety protection, in particular to an 800MHz digital wireless baby monitor with long communication distance, low radiation, detection and display of smoke and ambient temperature. Background technique [0002] The baby monitor, translated as Baby Monitor in English, belongs to the wireless home security protection system. The monitor monitors the baby's safety at any time. As a family security product, the baby monitor uses the monitoring terminal to provide real-time monitoring of the baby's every move, every word and deed, and the monitoring results are sent to the guardian's control terminal through radio waves of analog or digital signals. device, and restore it to video or audio. By using a baby monitor, parents or guardians no longer need to stay close to the baby or child to understand their behavior, and can immediately detect and deal with abnormal situations when they occur. Ba...

AI Technical Summary

Problems solved by technology

In the history of the baby monitoring industry, the baby monitors designed by people using analog circuits in the early days mainly had the following problems: (1) Using CTCSS or DCS encoding and decoding methods, it is easy to dissect the password, and the confidentiality is poor

(2) The circuit is complex, there are many components, and the production cost and failure rate are high

(3) Only the simplex working mode can be used. If the half-duplex working mode is adopted, the technology is difficult and the cost is very high

(4) The function is simple, it is difficult to meet the needs of high-end customers

(6) Large size

But there are the following problems: (1) The transmission power is high, the radiation is high, and the long-term transmission has a certain impact on the baby

(2) The communication distance is short, less than 300 meters, which limits the scope of application

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