An intelligent low-temperature fresh-keeping grain storage system

Abstract

The invention discloses an intelligent low-temperature fresh-keeping grain storage system. The intelligent low-temperature fresh-keeping grain storage system comprises a frequency acquisition circuit,a frequency division feedback circuit and a frequency selection output circuit; the frequency acquisition circuit receives the signal frequency in the input end of a signal transmission channel for receiving signals by a control terminal in the intelligent low-temperature fresh-keeping grain storage system, and the frequency division feedback circuit uses a triode Q2, a triode Q1 and a capacitorSC2-C4 to forms a frequency division circuit to divide signals into two paths of signals with the same amplitude and different frequencies, meanwhile, a triode Q6, a triode Q7, a resistor R19 and a resistor R20 form a composite circuit to prevent signal saturation distortion, and the frequency selection output circuit uses resistors R23-25 and capacitors C12-C14 to fors a frequency selection circuit to screen out a signal with a single frequency and output the signal, so that automatic frequency modulation and calibration can be carried out on a signal received by a control terminal in the intelligent low-temperature fresh-keeping grain storage system in a signal transmission channel, and signal distortion is prevented.

Description

technical field [0001] The invention relates to the field of circuit technology, in particular to an intelligent low-temperature fresh-keeping grain storage system. Background technique [0002] Grain storage work is closely related to the optimization and improvement of the quality of human life. With the continuous development of science and technology and the continuous improvement of people's living standards, higher requirements have been put forward for food safety control. With modern electronic technology and computer control Realize modern grain storage technology, among which the intelligent low-temperature fresh-keeping grain storage system is the current key development direction, which improves the management efficiency of grain storage work. However, in practical applications, the control terminal in the intelligent low-temperature fresh-keeping grain storage system uses the signal The signal in the transmission channel often has frequency hopping and attenuati...

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Problems solved by technology

[0002] Grain storage work is closely related to the optimization and improvement of the quality of human life. With the continuous development of science and technology and the continuous improvement of people's living standards, higher requirements have been put forward for food safety control. With modern electronic technology and computer control Realize modern grain storage technology, among which the intelligent low-temperature fresh-keeping grain storage system is the current key development direction, which improves the management efficiency of grain storage work. However, in practical applications, the control terminal in the intelligent low-temperature fresh-keeping grain storage system uses the signal The signal in the transmission channel often has frequency hopping and attenuation during the transmission process, which leads to signal distortion, causing the control terminal of the intelligent low-temperature fresh-keeping grain storage system to issue wrong instructions, which seriously affects the popularization and use of the intelligent low-temperature fresh-keeping grain storage system

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