Signal calibration circuit for industrial building fire fighting system

Abstract

The invention discloses a signal calibration circuit for an industrial building fire fighting system. The signal calibration circuit for the industrial building fire fighting system comprises a frequency acquisition circuit, a mean push-pull circuit and a filtering emission circuit; the frequency acquisition circuit acquires a signal frequency of an input end in an analog signal transmission channel in a signal transmission module of the industrial building fire fighting system; a first path of the mean push-pull circuit applies an operational amplifier AR1 to follow up a signal, and a secondpath of the mean push-pull circuit applies an operational amplifier AR4 and a triode Q3 as well as a capacitor C2 to form a noise reduction circuit to reduce a signal-to-noise ratio; then an operational amplifier AR2 is applied to carry out addition processing on two paths of signals; an output signal of the operational amplifier AR2 is input into a mean circuit consisting of an operational amplifier AR3 and a diode D2 as well as a diode D3; the filtering emission circuit applies an inductor L2 and a capacitor C4 as well as a capacitor C5 to form a filtering circuit to carry out filtering on the signal; the filtered signal is sent into a control terminal of the industrial building fire fighting system through a signal emitter E1; and after being automatically calibrated, the signal is converted into an error correction signal of the control terminal of the industrial building fire fighting system.

Description

Technical field [0001] The invention relates to the technical field of circuits, in particular to a signal calibration circuit of an industrial building fire protection system. Background technique [0002] At present, the industrial building fire protection system includes a control terminal, a signal transmission module, and an industrial building information acquisition module. The control terminal is used to receive the user's inspection result information based on the inspection of the target building site, and send the industrial building information acquisition module inspection result information to the control A terminal, the control terminal is used to receive the inspection result information, and based on the inspection result information, calculate the fire safety scores of the target construction site and the designated targets in the target construction site according to predetermined evaluation indicators; the control The terminal is also used to determine the fir...

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Problems solved by technology

[0002] At present, the industrial building fire protection system includes a control terminal, a signal transmission module, and an industrial building information collection module. The terminal, the control terminal is used to receive the inspection result information, and based on the inspection result information, calculate the fire safety score of the target building site and each designated target in the target building site according to the predetermined evaluation index; the control The terminal is further configured to determine the fire safety level of the target building site and each designated target in the target building site according to the calculated fire safety scores of the target building site and each designated target in the target building site , where the signal transmission module includes an analog signal transmission channel and a data signal transmission channel, and the signals in the analog signal transmission channel are easily disturbed and attenuated during the transmission process due to the large number of high-frequency equipment used in industrial production, resulting in the control terminal The received signal exceeds the error range, which affects the fire safety level result assessment of the control terminal's determined target

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