Agricultural greenhouse data transmission system

Abstract

The invention discloses an agricultural greenhouse data transmission system. The agricultural greenhouse data transmission system comprises a frequency acquisition circuit, a separation feedback circuit and a push-pull voltage stabilizing circuit. The frequency acquisition circuit acquires analog signal frequency output by the signal transmission module and received by the controller; according tothe separation feedback circuit, a capacitor C6, a capacitor C7 and a triode Q1 form a separation circuit to divide a signal into two paths of signals with the same frequency and different amplitudes; in one path, an operational amplifier AR1, a diode D1, a diode D2 and a capacitor C8 are used for forming a noise reduction circuit to reduce the signal-to-noise ratio; in the second path, an operational amplifier AR2, an operational amplifier AR3, a capacitor C4 and a capacitor C5 form a filter circuit to filter disturbance signals; finally, the push-pull voltage stabilizing circuit uses a triode Q4 and a triode Q5 to form a push-pull circuit to prevent signal crossover distortion, the signals are output after being stabilized by a voltage stabilizing tube D3, the signals in the signal transmission channel for the control terminal in the agricultural greenhouse data transmission system are detected in real time, the signals can be automatically calibrated, and signal distortion is prevented.

Description

technical field [0001] The invention relates to the field of circuit technology, in particular to an agricultural greenhouse data transmission system. Background technique [0002] In the prior art, a large data acquisition system for environmental parameter monitoring of greenhouses (application number: 201610176247.8) is disclosed. The greenhouse farthest from the monitoring center communicates wirelessly with another greenhouse closest to the monitoring center. The nearest greenhouse is connected to the data server group of the monitoring center through wireless means, and all the greenhouses between the greenhouse farthest from the monitoring center and the greenhouse closest to the monitoring center use the previous greenhouse to transmit data to the nearest next one The nearby communication principle of the greenhouse, until all the data is transmitted to the monitoring center, after all the data is collected, it can form a graph that intuitively reflects the changes o...

AI Technical Summary

Problems solved by technology

[0003] Among them, data transmission relies on the principle of nearest communication, which is equivalent to increasing the nodes of data transmission, reducing the distance of data transmission, and also increasing the number of data transmission modulation-demodulation, increasing the number of times of data signal transmission-reception, because each time Signal modulation-demodulation and transmission-reception increase the data frequency hopping or disturbance signal during this process, resulting in an increase in the output analog signal error of the controller receiving signal transmission module, and the display module display information in the agricultural greenhouse data transmission system Inaccurate

Images